ASSOCIATION CONNECTING

ELECTRONICS INDUSTRIES ®

IPC-4101A

Specification for Base

Materials for Rigid and
Multilayer Printed Boards

IPC-4101A
December 2001 A standard developed by IPC

Supersedes IPC-4101 2215 Sanders Road, Northbrook, IL 60062-6135

December 1997 Tel. 847.509.9700 Fax 847.509.9798
www.ipc.org
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 IPC-4101A
ASSOCIATION CONNECTING
ELECTRONICS INDUSTRIES ®

Specification for Base

Materials for Rigid and
Multilayer Printed Boards

Developed by the Laminate/Prepreg Materials Subcommittee (3-11) of

the Printed Board Base Materials Committee (3-10) of IPC

Supersedes: Users of this standard are encouraged to participate in the

IPC-4101 - December 1997 development of future revisions.
IPC-L-108
IPC-L-109 Contact:
IPC-L-112
IPC-L-115 IPC
IPC-AM-361 2215 Sanders Road
Northbrook, Illinois
60062-6135
Tel 847 509.9700
Fax 847 509.9798
This Page Intentionally Left Blank
December 2001 IPC-4101A

Acknowledgment
Any Standard involving a complex technology draws material from a vast number of sources. While the principal members
of the Laminate/Prepreg Materials Subcommittee (3-11) of the Printed Board Base Material Committee (3-10) are shown
below, it is not possible to include all of those who assisted in the evolution of this standard. To each of them, the mem-
bers of the IPC extend their gratitude.

Printed Board Base Laminate/Prepreg Technical Liaison of the

Material Committee Materials Subcommittee IPC Board of Directors
Chair Chair
Erik Bergum Douglas Sober Dr. William Beckenbaugh
Polyclad Laminates, Essex Technologies Sanmina
Incorporated Group Incorporated

Laminate/Prepreg Materials Subcommittee

Wolfgang Alberth, Isola Walter Christiansen, Resolution Mahendra Gandi, Space Systems/
Bernard Alzua, Bernard Alzua & Performance Products Loral
Associates John Christmas, U.S. Air Force Rick Gargus, Neltec, Incorporated
JoAnne Andrews, Sanmina Jennifer Chung, Resolution Joseph Gibson, Sanmina Corporation
Corporation Performance Products Richard Grannells, United
Masamitsu Aoki, Toshiba Chemical Christine Coapman, Delphi Technologies
Company Automation Lisa Greenleaf, Teradyne Connection
Bruce Ballert, Borden Chemical Eric Collis, PPG Industries Systems
Richard Barnett, Compaq Computer David Coppens, Isola Laminate Jason Gretton, Matsushita/Aromat
Keith Bendyk, JPS Glass Systems Corporation Chester Guiles, Arlon MED
Gerald Bouska, Isola Laminate Michael Davis, GE Electromaterials William Hall, Oak-Mitsui
Systems Corporation John DeBrita, Sanmina Corporation Robert Hearn, Dow Chemical USA
James Brady, Isola Laminate Systems Nitin Desai, Motorola, Incorporated Adam Hen, Celestica International
Corporation William Dieffenbacher, BAE Systems Rocky Hilburn, Gould Electronics
Jack Bramel, Jack Bramel & Controls Incorporated
Associates Paul DuFresne, Yates Foil USA Philip Hinton, Hinton PWB
Thomas Bresnan, Sanmina Incorporated Engineering
Corporation Robert Dunnagan, BGF Industries David Ho, Unique Interconnect
Carl Brooks, Northrup Grumman Theodore Edwards, Honeywell Incorporated
Corporation Incorporated David Iguchi, Park/Nelco
Judy Brown, Winonics, Incorporated Douglas Eng, PPG Industries Steven Ising, Borden Chemical
Michael Bryant, BGF Industries Werner Engelmaier, Engelmaier John Jephson, Circuit Foil Trading
Victor Brzozowski, Northrup Associates, LC
Lawrence Johnson, LGJ Technologies
Grumman Corporation Steven Ethridge, Sanmina
Albert Jones, University of Alabama
Thomas Burke, Polyonics Corporation
Corporation Yvonne Julian-Hargrove, Dow
Thomas Farrell, Underwriters
Chemical USA
John Callahan, Gould Electronics Laboratories Incorporated
Incorporated Richard Kajander, Johns Manville
Peter Fiedler, BFGoodrich
H. Landis Carter, JPS Glass Joan Karner, Holaday Circuits
Terry Fischer, Hitachi Chemical
Gerard Cave, Pacific Testing Company America Hideo Kato, Nitto Boseki Co.,
Laboratories Limited
Kent Fujiwara, Sumitomo Plastics
Clifton Cavin, Motorola SSTG America Stephen Keller, Trace Labs-East
Philip Chen, Intel Corporation Lionel Fullwood, WKK Distribution Thomas Kemp, Rockwell Collins
Limited

iii
IPC-4101A December 2001

Patricia Klein, Tyco Printed Circuit Scott Opperhauser, Trace Labs-East Scott Sharot, AIL Systems
Group Daniel Osenbaugh, Multiline Incorporated
Robert Konsowitz, GIL Technologies Technologies William Shaw, FiberMark,
John Kozuch, 4DI Inc. Raul Pabon, Resolution Performance Incorporated
Raymond Lavallee, Borden Chemical Products Lowell Sherman, Defense Supply
Deepak Pai, General Dynamics Center Columbus
James Legein, Raytheon Company
Information Systems Michael Shin, Pacific Testing
Katie Lehnert, Dow Chemical USA
John Penc, Taconic Advanced Laboratories
Joseph Leibowitz,
Dielectric Division Hans Shin, Pacific Testing
Edward Lewis, Isola Laminate Laboratories
John Pfinney, Matsushita/Aromat
Systems Corporation
Morris Pfinney, Pfinney Associates Edward Skorupski, Oak-Mitsui
David Lowery, Summit Products &
Thierry Philbert, Hexcel Fabrics S.A. Andrew Slade, Sanmina Corporation
Services
Miguel Rincon, Electroply, Joseph Slanina, Honeywell
P. Douglas Lyle, Advanced Glassfiber
Incorporated Incorporated
Yarns
Paul Rose, Lockheed Martin Clark Smedstad, BGF Industries
Alfred Macha, Sanmina Corporation
Electronics & Missles George Stoddart, Canadian Standard
Thomas Martin, Owens-Corning
Craig Ruggeri, Yates Foil USA Association
Fiberglass Corporation
Incorporated Kurt Summa, Young Electronics
Renee Martinez, TRW Electronics &
Technology Division Visa Ruuhonen, Nokia Networks Valetin Tereshkin, Elma Limited
Brian McCrory, Delsen Testing Labs David Salerno, Advanced Roger Tietze, Vantico Incorporated
Interconnection Technology Christopher Totten, Gividi USA
David McGowan, DRM Consulting
Jerome Sallo, Sallo Consulting Incorporated
David McGregor, E. I. Du Pont de
Services James Tracy, GE Electromaterials
Nemours and Company
Joseph Salvini, Underwriters Kenneth Trude, Sanmina Corporation
Darryl McKenney, Parlex
Laboratories Incorporated
Corporation James (Tom) Turner, Isola Laminate
Rolland Savage, Gould Electronics Systems Corporation
Bill Mercer, Dow Chemical USA
Incorporated
Nicholas Mescia, Ciena Corporation Antti Vaisanen, Nokia Networks
Fabio Scari, Gividi Italia S.p.A.
Renee Michalkiewicz, Trace Crystal Vanderpan, Underwriters
Marco Scari, Gividi USA Laboratories Incorporated
Labs-East
Incorporated
Keita Miyasota, Nitto Boseki Co., David Wagner, Flex-Link Products
Fredrich Schlitter, Ruwel-Werke
Limited Daniel Welch, Arlon MED
GmbH
Cameron Murray, 3M Company Dewey Whittaker, Honeywell
Steven Sekanina, Neltec,
Joel Murray, Hexcel Schwebel Incorporated
Incorporated
Michael Musich, Underwriters Xie Xiaoyan, Guangdong Shegyi Sci.
Kenneth Selk, TRW Electronics &
Laboratories Incorporated Tech Co., Limited
Technology Division
Robert Neves, Microtek Laboratories Roman Zotman, Gould Electronics
Suzanne Seymour, Taconic Advanced
Incorporated
Thomas Nowak, Nowak & Associates Dielectric Division
Gerard O’Brien, Photocircuits
Corporation

iv
December 2001 IPC-4101A

Table of Contents
1 SCOPE ......................................................................... 1 3.4.1 Qualification Testing of Laminate ................... 7
1.1 Classification .................................................... 1 3.4.2 Qualification Testing of Prepreg...................... 7
1.1.1 Specification Sheet Description ....................... 1 3.5 Verification of Manufacturer’s
1.1.2 Nominal Laminate Thickness .......................... 1 Quality System ................................................. 9
1.1.3 Metal Cladding Type and Nominal 3.6 Conflict ............................................................. 9
Weight/Thickness ............................................. 1 3.7 Materials .......................................................... 9
1.1.3.1 Metal Cladding Type........................................ 1 3.7.1 Metal Cladding................................................. 9
1.1.3.2 Nominal Weight/Thickness .............................. 1 3.7.2 Reinforcement Fabric....................................... 9
1.1.4 Thickness Tolerance (Laminate)...................... 1 3.7.3 Resin Systems .................................................. 9
1.1.5 Surface Quality Class....................................... 2 3.8 General Requirements ...................................... 9
1.1.6 Reinforcement Style......................................... 2 3.8.1 Fabricated Sheets and Panels ......................... 9
1.1.7 Prepreg Parameters........................................... 2 3.8.1.1 Fabricated Laminate Sheet Material................ 9
1.1.8 Color ................................................................. 2 3.8.1.2 Fabricated Laminate Panel Material................ 9
1.1.8.1 Contrast Agents ................................................ 2 3.8.1.3 Fabricated Prepreg Panels................................ 9
1.2 Dimensions and Tolerances ............................. 3 3.8.1.4 Fabricated Prepreg Rolls.................................. 9
1.2.1 Metric and Imperial Measurements................. 3 3.8.2 Inspection Lot ................................................. 9
3.8.2.1 Inspection Lot for Laminate ............................ 9
2 APPLICABLE DOCUMENTS ...................................... 3
3.8.2.2 Inspection Lot for Prepreg............................... 9
2.1 IPC ................................................................... 3
3.8.2.3 Preparation of Samples .................................... 9
2.2 National Conference of Standards
Laboratories (NCSL) ...................................... 4 3.8.2.4 Etching Process and Etchant Removal
for Copper Foil Specimens ............................ 10
2.3 International Standards ................................... 4
3.8.2.5 Standard Laboratory Conditions .................... 10
2.4 Underwriters Laboratories (UL) ..................... 4
3.8.3 Visual Properties ........................................... 10
3 REQUIREMENTS ....................................................... 4
3.8.3.1 Laminate Visual Properties ............................ 10
3.1 Terms and Definitions ...................................... 4 3.8.3.1.1 Foil Indentations............................................. 10
3.1.1 Qualification Assessment ................................. 4 3.8.3.1.2 Wrinkles.......................................................... 10
3.1.2 Quality Conformance Testing .......................... 5 3.8.3.1.3 Scratches......................................................... 10
3.1.3 Manufacturer’s Quality System ....................... 5 Plastic Surface Finish of Metal-Clad
3.8.3.1.4
3.1.4 Process Control Testing ................................... 5 Single-Sided Base Material............................ 10
3.1.5 Self Declaration................................................ 5 3.8.3.1.5 Surface Finish of Foil after Curing –
3.1.6 Quality Assessment Data ................................. 5 Except Double Treat ...................................... 10
3.1.7 Sample Qualification ........................................ 5 3.8.3.1.6 Surface and Subsurface Imperfections ........ 10
3.1.8 Production Data................................................ 5 3.8.3.2 Prepreg Visual Properties............................... 11
3.1.9 Customer Test Data.......................................... 5 3.8.3.2.1 Inclusions........................................................ 11
3.1.10 Internal Assessment.......................................... 5 3.8.3.2.2 Impregnation Imperfections ........................... 11
3.1.11 Individual Customer Audit............................... 5 3.8.4 Dimensional.................................................... 11
3.1.12 Independent Third Party Assessment .............. 5 3.8.4.1 Length and Width........................................... 11
3.1.13 Epoxy, Multifunctional..................................... 5 3.8.4.1.1 Length and Width of Laminate...................... 11
3.1.14 Epoxy, Difunctional ......................................... 5 3.8.4.1.2 Length and Width of Prepreg ........................ 11
3.1.15 AABUS............................................................. 7 3.8.4.1.3 Prepreg Roll Width......................................... 11
3.1.16 Filler.................................................................. 7 3.8.4.1.4 Prepreg Roll Length ....................................... 11
3.2 Specification Sheets.......................................... 7 3.8.4.2 Thickness ....................................................... 11
3.3 Manufacturer Quality Profile ........................... 7 3.8.4.2.1 Class A, B, and C Laminate Materials.......... 11
3.4 Qualification Testing ........................................ 7 3.8.4.2.2 Class D Laminate Materials........................... 11

v
IPC-4101A December 2001

3.8.4.2.3 Class K, L, M Laminate Materials................ 11 4.3 Qualification Testing ..................................... 18

3.8.4.2.4 Thickness Tolerance of Laminate 4.3.1 Samples........................................................... 18
Materials ......................................................... 11 4.3.2 Frequency ....................................................... 18
3.8.4.3 Bow and Twist of Laminate Materials.......... 13 4.3.3 Laminator Qualification Profile ..................... 18
3.8.4.3.1 Sheets and Panels with Both Dimensions..... 13 4.3.4 Changes in Composition ................................ 18
3.8.4.3.2 Panels with One or Both Dimensions .......... 13 4.3.5 Qualification Data Retention.......................... 18
3.9 Physical Requirements .................................. 13 4.4 Quality Conformance Inspection ................... 18
3.9.1 Physical Requirements of Laminate 4.4.1 Frequency ....................................................... 18
Materials ........................................................ 13
4.4.2 Acceptance Criteria ........................................ 18
3.9.1.1 Peel Strength .................................................. 13
4.4.3 Rejected Lots.................................................. 19
3.9.1.1.1 Peel Strength after Thermal Stress ................ 14
4.4.4 Conformance Data Retention......................... 19
3.9.1.1.2 Peel Strength at Elevated Temperature ......... 14
4.4.5 Certificate of Conformance............................ 19
3.9.1.1.3 Peel Strength after Process Chemicals
(Optional)........................................................ 14 4.5 Statistical Process Control (SPC) .................. 19
3.9.1.2 Dimensional Stability..................................... 14 5 PREPARATION FOR DELIVERY ............................ 19
3.9.2 Physical Requirements of Prepreg 5.1 Packaging Materials ....................................... 19
Materials ........................................................ 14
5.2 Authorized Distributors.................................. 19
3.10 Chemical Requirements ................................ 15
3.10.1 Chemical Requirements of Laminate 6 NOTES ...................................................................... 19
Materials ........................................................ 15 6.1 Ordering Information .................................... 19
3.10.2 Chemical Requirements of Prepreg 6.1.1 Ordering Data for Laminate Materials .......... 19
Materials ........................................................ 16 6.1.2 Ordering Data for Prepreg Materials............. 20
3.11 Electrical Requirements ................................ 16 6.2 New Materials ................................................ 20
3.11.1 Electrical Requirements of Laminate
Materials ........................................................ 16
3.11.2 Electrical Requirements of Prepreg
Materials ......................................................... 16 Figures
3.12 Environmental Requirements ........................ 16 Figure 3-1 Thickness Measurements for Laminates......... 12
3.12.1 Environmental Requirements of Laminate
Materials ........................................................ 16
3.12.2 Environmental Requirements of Prepreg
Materials ........................................................ 17 Tables
3.13 Substitutability .............................................. 17 Table 1-1 Metal Cladding Types........................................... 2
3.13.1 Substitutability of Classes of Pits Table 1-2 Copper Foil Weight and Thickness ...................... 3
and Dents........................................................ 17 Table 3-1 Reference Information and Test Frequency
3.13.2 Substitutability of Classes of Thickness of Laminate........................................................... 6
Tolerance ........................................................ 17 Table 3-2 Reference Information and Test Frequency
of Prepreg............................................................. 8
3.13.3 Remarking of Substituted Laminates ............ 17
Table 3-3 Point Value for Longest
3.14 Marking ......................................................... 17 Dimensions of Indentation.................................. 10
3.14.1 Marking Laminate Materials.......................... 17 Table 3-4 Surface Quality Classification ............................ 10
3.14.2 Marking Prepreg Materials ............................ 17 Table 3-5 Permissible Variation in Length and Width
3.14.3 Marking of Shipping Containers ................... 17 of Laminates....................................................... 12
Table 3-6 Permissible Variation in Length and Width
3.15 Workmanship.................................................. 17
of Prepregs......................................................... 12
3.16 Material Safety ............................................... 17 Table 3-7 Thickness and Tolerances for Laminates .......... 13
3.17 Prepreg Shelf Life .......................................... 17 Table 3-8 Permissible Bow and Twist for Laminates, %.... 13

4 QUALITY ASSURANCE PROVISIONS ................... 18 Table 3-9 Flammability Requirements................................ 15

4.1 Quality System ............................................... 18 Table 4-1 Quality Conformance Plan for Monthly,
Quarterly and Annual Tests – Laminate............. 18
4.2 Responsibility for Inspection ......................... 18
Table 4-2 Quality Conformance Plan for Monthly,
4.2.1 Test Equipment and Inspection Facilities...... 18 Quarterly and Annual Tests – Prepreg............... 18

vi
December 2001 IPC-4101A

Specification for Base Materials for

Rigid and Multilayer Printed Boards

1 SCOPE The headings for each specification sheet include reference

This specification covers the requirements for base materi- definitions for the material, which cover the reinforce-
als, herein referred to as laminate or prepreg, to be used ments, resin systems, flame retardants, and fillers used, as
primarily for rigid or multilayer printed boards for electri- well as its other known identifications and glass transition
cal and electronic circuits. temperature, Tg. The specific line items within the specifi-
cation sheets are the requirements that material shall meet
1.1 Classification The system shown below identifies in order to be certified to this specification.
clad and unclad laminate or prepreg base materials. The
specification sheets serve as a cross-reference connecting 1.1.2 Nominal Laminate Thickness The nominal thick-
the outlined callout system in this document to previously ness is identified by four digits. For all substrates covered
used systems. by this document, thicknesses may be specified or mea-
Example for laminate base materials where this specifica- sured either over the cladding or over the dielectric (see
tion is referenced: 1.1.4 and 3.8.4.2). For metric specification, the first digit
represents whole millimeters, the second represents tenths
L Material Designator (see 1.1.1) of millimeters, etc. For orders requiring Imperial units, the
25 Specification Sheet Number (see 1.1.1) four digits indicate the thickness in ten-thousandths of an
inch (tenths of mils). In the example shown in 1.1, 1500 is
1500 Nominal Laminate Thickness (see 1.1.2) designated for the Imperial unit usage of 0600 for a lami-
C1/C1 Metal Cladding Type and Nominal Weight/ nate with thickness of 1.5 mm [59.1 mil].
Thickness (see 1.1.3)
1.1.3 Metal Cladding Type and Nominal Weight/
A Thickness Tolerance Class (see 1.1.4) Thickness The type and nominal weight or thickness of
A Surface Quality Class (see 1.1.5) the metallic cladding for laminate base material is identi-
fied by five designators. The first and fourth designators
Example for prepreg base materials where this specification
indicate the type of cladding; the third designator is a slash
is referenced:
mark that differentiates sides of the base material; the sec-
P Material Designator (see 1.1.1) ond and fifth designators indicate the nominal weight or
thickness of the metallic cladding.
25 Specification Sheet Number (see 1.1.1)
E7628 Reinforcement Style (see 1.1.6) 1.1.3.1 Metal Cladding Type The types of metallic clad-
ding and the designators representing them are shown in
TW Resin Content Method (see 1.1.7)
Table 1-1. Table 1-1 is provided as a reference only. The
RE Flow Parameter Method (see 1.1.7) referee document is the latest version of IPC-CF-148, IPC-
4562, or IPC-CF-152 as appropriate. Cladding types C and
VC Optional Prepreg Method (see 1.1.7)
R, and cladding types H and S, may be used interchange-
1.1.1 Specification Sheet Description At the end of this ably as agreed upon between user and supplier. Cladding
document is a series of specification sheets. Each specifi- type H can be used for type C and type S can be used for
cation sheet outlines requirements for both laminate and type R. Cladding type R may be substituted for type C, and
prepreg for each product grade. The specification sheets are cladding type S may be substituted for type H.
organized by a specific reinforcement type, resin system,
and/or construction and are provided with a specification 1.1.3.2 Nominal Weight/Thickness The weight or thick-
sheet number for ordering purposes. For convenience, the ness of metallic cladding and the designators representing
laminate and prepreg requirements for materials of the like them are listed in Table 1-2. Table 1-2 is provided as a ref-
composition are on the same specification sheet. Material erence only. The referee document is the latest version of
Designator ‘‘L’’ indicates laminate material and Material IPC-CF-148, IPC-4562, or IPC-CF-152 as appropriate.
Designator ‘‘P’’ indicates prepreg material as shown in des-
ignation examples in 1.1. When certifying to multiple 1.1.4 Thickness Tolerance (Laminate) The class of
specification sheets, the strongest performance require- thickness tolerance for laminate base material is identified
ments shall apply. by either A, B, C, D, K, L, M, or X (as agreed upon

1
IPC-4101A December 2001

Table 1-1 Metal Cladding Types c) A3080 represents aramid reinforcement style 3080 per
A Copper, wrought, rolled (IPC-4562, grade 5) IPC-A-142.
B Copper, rolled (treated) d) Q0525 represents quartz reinforcement style 525 per
C Copper, electrodeposited (IPC-4562, grade 1) IPC-QF-143.
D Copper, electrodeposited, double treat (IPC-4562, Reinforcement properties such as thickness, construction,
grade 1) and weight are established in accordance with the rein-
G Copper, electrodeposited, high ductility (IPC-4562, forcement style designations of the appropriate material
grade 2) specification.
H Copper, electrodeposited, high temperature elongation
(IPC-4562, grade 3) 1.1.7 Prepreg Parameters A variety of test procedures
J Copper, electrodeposited, annealed (IPC-4562, grade can be used to specify and determine fitness for use of
4) prepreg in multilayer printed board applications. The
K Copper, wrought, light cold rolled (IPC-4562, grade 6) amount of resin and how much that resin will flow under
L Copper, wrought, annealed (IPC-4562, grade 7) specified conditions are the two critical performance char-
M Copper, wrought, rolled, low temperature annealable acteristics. The specification for prepreg shall consist of
(IPC-4562, grade 8) one test from Group A and one test from Group B, as
N Nickel shown below with the corresponding designators. The use
O Unclad of a test from Group C is optional. If no test is chosen from
P Copper, electrodeposited, high temperature elongation, Group C, zero-zero (00) shall be the designator. The choice
double treat (IPC-4562, grade 3) of the tests shall be as agreed upon between user and sup-
R Copper, reverse treated electrodeposited (IPC-4562, plier and supplied as part of the ordering information. The
grade 1) nominal value and tolerances for the individual tests shall
S Copper, reverse treated electrodeposited, high tem- be as specified on the purchase order or by other agreement
perature elongation (IPC-4562, grade 3) between user and supplier. Additional test(s) can be speci-
T Copper, copper foil parameters as dictated by contract fied by agreement between user and supplier but the addi-
or purchase order
tional test(s) will not be part of the designator.
U Aluminum
V Copper, reverse treated electrodeposited, high tem-
Group A
perature elongation (IPC-4562, grade 3) for buried Resin Content Tests
capacitance applications RC – Resin Content Percent
X As agreed between user and supplier (AABUS) TW – Treated Weight Total
Y Copper Invar Copper 00 – None Specified
Z Copper, electrodeposited, high temperature elongation, Group B
double-treat (IPC-4562, grade 3) for buried capacitance
applications Flow Parameter Tests
MF – Resin Flow Percent
between user and supplier) as described in 3.8.4.2. Material SC – Scaled Flow Thickness
certified to tighter tolerances can be used to meet lower NF – No Flow
tolerance requirements without recertification (i.e., Class C RE – Rheological Flow
material can be used for Class B). DH – Delta H
PC – Percent Cure
1.1.5 Surface Quality Class The class of surface quality 00 – None Specified
is identified by either A, B, C, D, or X (as agreed upon
Group C
between user and supplier) as described in 3.8.3. Material
Optional Prepreg Tests
certified to a higher surface quality can be used to meet
VC – Volatile Content
lower surface quality requirements without recertification
DY – Dicy Inspection
(i.e., Class B material can be used for Class A).
GT – Gel Time
00 – None Specified
1.1.6 Reinforcement Style The reinforcement type and
style of the prepreg is indicated by five digits, based on the 1.1.8 Color Unless otherwise specified, all laminate and
chemical type and style. Typical examples of reinforcement prepreg are supplied in the natural (undyed/unpigmented)
designators are shown below: color. If the user requires another color, it shall be speci-
a) E7628 represents E-glass reinforcement style 7628 per fied on the purchase order.
IPC-4412. 1.1.8.1 Contrast Agents Contrast agents, which may be
b) S0313 represents S-glass reinforcement style 313 per added to a natural color resin system to enhance process-
IPC-SG-141. ing, such as tinting agents for contrast in automatic optical

2
December 2001 IPC-4101A

Table 1-2 Copper Foil Weight and Thickness

Metric English
Common
Foil Industry Area Weight Nominal Area Weight Area Weight Nominal
Designation Terminology (g/m2) Thickness (µm) (oz./ft.2) (g/254 in2) Thickness (mils)
E 5 µm 45.1 5.1 0.148 7.4 0.20
Q 9 µm 75.9 8.5 0.249 12.5 0.34
T 12 µm 106.8 12.0 0.350 17.5 0.47
H 1/2 oz 152.5 17.1 0.500 25.0 0.68
M 3/4 oz 228.8 25.7 0.750 37.5 1.01
1 1 oz 305.0 34.3 1 50.0 1.35
2 2 oz 610.0 68.6 2 100.0 2.70
3 3 oz 915.0 102.9 3 150.0 4.05
4 4 oz 1220.0 137.2 4 200.0 5.40
5 5 oz 1525.0 171.5 5 250.0 6.75
6 6 oz 1830.0 205.7 6 300.0 8.10
7 7 oz 2135.0 240.0 7 350.0 9.45
10 10 oz 3050.0 342.9 10 500.0 13.50
14 14 oz 4270.0 480.1 14 700.0 18.90
For nominal weights not listed in this table the nominal thickness is calculated as follows:
Thickness (mils) = 1.35 x Area Wt. (oz/ft2 )
Where 1.35 is a factor determined from the density of copper foil assumed to be 8.93 g/cm3 [5.16 oz/in3].
This factor is within 1% for all densities from 8.81 g/cm3 to 8.99 g/cm3.
For any alloy or other metals outside this density range the appropriate factor must be used to calculate the foil thickness.
Caution: Nominal thickness values in the table are not representative of mechanical thickness of the foil. An allowance for the roughness of the treated side
must be added to all values.

inspection (AOI), shall not adversely affect the perfor- IPC-QF-143 Specification for Finished Fabric Woven from
mance, properties, or functionality of the laminate or Quartz (Pure Fused Silica) for Printed Boards
prepreg and shall be considered as the natural color.
IPC-CF-148 Resin Coated Metal Foil for Printed Boards
1.2 Dimensions and Tolerances All dimensions and tol-
IPC-CF-152 Composite Metallic Material Specification for
erances specified herein are applicable to only the end
Printed Wiring Boards
product. Dimensions are expressed in millimeters. Refer-
ence information is shown in parentheses. IPC-TM-650 Test Methods2

1.2.1 Metric and Imperial Measurements IPC policy is

2.1.5 Surface Examination, Unclad and Metal-Clad
that documents be published in hard metric units with soft Material
imperial units in brackets. 2.1.9 Surface Scratch Examination Metal-Clad Foil
2.1.10 Visual Inspection for Undissolved Dicyandia-
2 APPLICABLE DOCUMENTS mide
The following documents of the issue in effect at the time 2.2.19.1 Length, Width and Perpendicularity of Laminate
of the order form a part of this specification to the extent and Prepreg Panels
specified herein.
2.3.1.1 Chemical Cleaning of Metal-Clad Laminate
2.1 IPC1 2.3.4.2 Chemical Resistance of Laminates, Prepreg and
Coated Foil Products, by Solvent Exposure
IPC-T-50 Terms and Definitions for Interconnecting and 2.3.6 Etching, Ammonium Persulfate Method
Packaging Electronic Circuits
2.3.7 Etching, Ferric Chloride Method
IPC-SG-141 Specification for Finished Fabric Woven from 2.3.7.1 Cupric Chloride Etching Method
‘‘S’’ Glass for Printed Boards 2.3.10 Flammability of Laminate
IPC-A-142 Specification for Finished Fabric Woven from 2.3.16 Resin Content of Prepreg, by Burn-Off
Aramid for Printed Boards 2.3.16.1 Resin Content of Prepreg, by Treated Weight

1. IPC, 2215 Sanders Road, Northbrook, IL 60062

2. Current and revised IPC Test Methods are available through IPC-TM-650 subscription and on the IPC Web site (www.ipc.org/html/testmethods.htm).

3
IPC-4101A December 2001

2.3.16.2 Treated Weight of Prepreg IPC-QL-653 Qualification of Facilities that Inspect/Test

2.3.17 Resin Flow Percent of Prepreg Printed Boards, Components, and Materials
2.3.17.2 Resin Flow of ‘‘No Flow’’ Prepreg IPC-1730 Laminator Qualification Profile
2.3.18 Gel Time, Prepreg Materials
IPC-4110Specification and Characterization Methods for
2.3.19 Volatile Content of Prepreg Nonwoven Cellulose Based Paper for Printed Boards
2.4.4 Flexural Strength of Laminates (at Ambient
Temperature) IPC-4121 Guidelines for Selecting Core Constructions for
Multilayer Printed Wiring Board Applications
2.4.4.1 Flexural Strength of Laminates (at Elevated
Temperature) IPC-4130Specification and Characterization Methods for
2.4.8 Peel Strength of Metallic Clad Laminates Nonwoven ‘‘E’’ Glass Mat
2.4.8.2 Peel Strength of Metallic Clad Laminates at
IPC-4411 Specification and Characterization Methods for
Elevated Temperature (Hot Fluid Method)
Nonwoven Para-Aramid Reinforcement
2.4.8.3 Peel Strength of Metallic Clad Laminate at
Elevated Temperature (Hot Air Method) IPC-4412 Specification for Finished Fabric Woven from
2.4.13.1 Thermal Stress of Laminates ‘‘E’’ Glass for Printed Boards
2.4.22.1 Bow and Twist, Laminate IPC-4562 Metal Foil for Printed Wiring Applications
2.4.24 Glass Transition Temperature and Z-Axis Ther-
mal Expansion by TMA IPC-9191 General Guidelines for Implementation of Sta-
tistical Process Control (SPC)
2.4.25 Glass Transition Temperature and Cure Factor
by DSC3 J-STD-003 Solderability Test for Printed Boards
2.4.38 Prepreg Scaled Flow Testing
2.2 National Conference of Standards Laboratories
2.4.39 Dimensional Stability, Glass Reinforced Thin
(NCSL)4
Laminates
2.4.41 Coefficient of Linear Thermal Expansion of ANSI/NCSL Z540-1-1994 General Requirements for Cali-
Electrical Insulating Materials bration Laboratories and Measuring and Test Equipment
2.4.41.1 Coefficient of Thermal Expansion by the Vitre-
2.3 International Standards5
ous Silica (Quartz) Dilatometer Method
2.5.1 Arc Resistance of Printed Wiring Material ISO 10012-1 Quality Assurance Requirements for Measur-
2.5.5.2 Dielectric Constant and Dissipation Factor of ing Equipment, Part 1 - Metrological Confirmation System
Printed Wiring Board Material - Clip Method for Measuring Equipment
2.5.5.3 Permittivity (Dielectric Constant) and Loss Tan-
2.4 Underwriters Laboratories (UL)6
gent (Dissipation Factor) of Materials (Two
Fluid Cell Method) UL 94 Flammability
2.5.5.9 Permittivity and Loss Tangent, Parallel Plate, 1
MHz to 1.5GHz 3 REQUIREMENTS

2.5.6 Dielectric Breakdown of Rigid Printed Wiring

3.1 Terms and Definitions The definition of terms shall
Material
be in accordance with IPC-T-50 and as stated in 3.1.1
2.5.6.2 Electric Strength of Printed Wiring Material through 3.1.15.
2.5.17.1 Volume and Surface Resistivity of Dielectric
Materials 3.1.1 Qualification Assessment Qualification assess-
ment is a form of risk reduction between a buyer and a
2.6.1 Fungus Resistance, Printed Wiring Materials
source for laminates and prepregs. The laminator shall pro-
2.6.2.1 Water Absorption, Metal Clad Plastic Laminates duce an assessment of capabilities and sources of verifica-
2.6.16 Pressure Vessel Method for Glass Epoxy Lami- tion for the buyer to evaluate. The buyer must then review
nate Integrity this assessment and determine whether the information and

3. Test Method 2.4.25 also describes the delta glass transition temperature test (Delta Tg)
4. NCSL, 1800 - 30th Street, Suite 305B, Boulder, Colorado 80301-1032, 303-440-3339, www.ncsl-hq.org
5. ANSI, 11 West 42nd St., New York, NY 10036, 212-642-4900, www.ansi.org
6. Underwriters Laboratories, Inc., 1285 Wait Whitman Road, Melville, Long Island, NY 11746

4
December 2001 IPC-4101A

verification provided constitute an acceptable level of risk. 3.1.7 Sample Qualification Verification by sample quali-
The more verification of self-declaration parameters pro- fication signifies a manufacturer is capable of producing a
vided, the lower the risk factor associated with utilizing a product with a given set of parameters at the time when the
new laminator. There is no minimum level of qualification qualification sample is manufactured. Sample qualification
assessment verification required by this specification, and it testing of laminate and prepreg performance characteristics
is between the buyer and laminator to determine the extent shall be performed at a facility that demonstrates compli-
of verification applicable to their requirements. If the risk ance with IPC-QL-653.
assessment is determined to be unacceptably high, the risk
may be reduced by increasing the verification require-
ments. The cost associated with reducing this risk varies 3.1.8 Production Data Production data is normal perfor-
with the type of verification determined to be necessary. mance data from manufacturing runs generated as a quality
assurance function. This data can be compiled, analyzed,
3.1.2 Quality Conformance Testing Quality conform- and reported as support for product compliance to this
ance testing is performed on a regular basis following specification by the laminator.
qualification testing as determined by the manufacturer’s
quality system. This is done to demonstrate the supplier is 3.1.9 Customer Test Data Customer test data is normal
continually meeting the finished product requirements of performance data generated at incoming inspection by the
this specification and the applicable specification sheet for customer. This data can be compiled, analyzed, and
each base material. In the absence of a documented manu-
reported as support for product compliance to this specifi-
facturer’s quality system, the conformance testing shall be
cation by the laminator.
conducted in accordance with the frequency as specified in
Table 3-1 for laminates and Table 3-2 for prepregs.
3.1.10 Internal Assessment Internal assessments con-
3.1.3 Manufacturer’s Quality System The manufactur- sist of periodic supplier verification of data contained in the
er’s quality system is an organized entity within the lami- quality profile section of the self declaration.
nator’s operation that administers the documentation sys-
tem, steering committee, lines of responsibilities, etc., as
3.1.11 Individual Customer Audit The individual cus-
described in IPC-9191.
tomer audit is an evaluation of the laminator’s facility to
Any equipment for inspection or testing in accordance with compare the current management quality system against
this document shall meet ANSI/NCSL Z540-1-1994 or ISO the self declaration and the requirements of this specifica-
10012-1. tion. The analysis, summary, and necessary corrective
actions may become part of the laminator’s self declaration
3.1.4 Process Control Testing Process control testing is at the discretion of the customer.
performed for the purpose of nominalizing the critical steps
of the manufacturers’ internal process.
3.1.12 Independent Third Party Assessment Assess-

3.1.5 Self Declaration The first level of qualification ments are performed by a third party assessor, which is
assessment is self declaration. A completed IPC-1730 con- generally procedural in nature. Examples of third party
tains a profile of a manufacturer’s site capability, process- assessors are International Organization for Standardization
ing and test equipment, technology specifics, quality pro- (ISO) Registrars, Malcom Baldridge (BNQP), Underwrit-
gram, manufacturing history, company information, and ers’ Laboratories (UL), Canadian Standards Agency (CSA),
data verification sources. Self declaration is the laminator’s International Electrotechnical Commission Quality Assess-
view of its products and process capabilities to meet the ment (IECQ), etc.
customer’s requirements, the requirements of this specifi-
cation, and the applicable associated specification sheet(s) 3.1.13 Epoxy, Multifunctional Any epoxy polymer,
(see 3.3).
monomer, or oligomer with three or more potentially reac-
tive epoxy functional groups.
3.1.6 Quality Assessment Data The data contained in
the self assessment is compiled and analyzed for perfor-
mance characteristics of laminates or prepregs. The perfor- 3.1.14 Epoxy, Difunctional Any epoxy polymer, mono-
mance data may be based on information from a variety of mer, or oligomer with two potentially reactive epoxy func-
both internal and external sources. tional groups.

5
IPC-4101A December 2001

Table 3-1 Reference Information and Test Frequency of Laminate

Conformance Specimens
Requirement Test1 Qualification Conformance Testing per Sheet
Tests Paragraph Method Testing Testing Frequency Sampled
General
Visual Properties 3.8.3.1 2.1.5 U U Audit2 -
Surface Finishes 3.8.3.1.1 - 2.1.5 2
U Audit
3.8.3.1.5 2.1.9
Surface/Sub-Surface
3.8.3.1.6 U U Lot 3
Imperfections
Dimensional
Length/Width 3.8.4.1 2.2.19.1 U U Audit9 -
Squareness 3.8.4.1.1 2.2.19.1 U U Audit9 -
Thickness 2.2.18
3.8.4.2 U U Audit9 -
2.2.18.1
Bow/Twist 3.8.4.3 2.4.22.1 U U Lot 1
Physical
Peel Strength
3.9.1.1.1 2.4.8 U U Lot 45
After Thermal Stress
Peel Strength 2.4.8
at Elevated Temperature4 3.9.1.1.2 2.4.8.2 U U 3 Months 45
2.4.8.3
Peel Strength After Exposure to3,4
3.9.1.1.3 2.4.8 U U 3 Months 45
Process Solutions
Dimensional Stability11 3.9.1.2 2.4.39 U U 1 Month 3
13
Flexural Strength 3.9.1.3 2.4.4 U U 12 Months 67
Flexural Strength at Elevated
3.9.1.4 2.4.4.1 U U 3 Months 38
Temperatures4
Chemical
Flammability10,12 3.10.1.1 UL94 U U 1 Month 5
Thermal Stress Etched 3.10.1.2 2.4.13.1 U U Lot 2
Thermal Stress Unetched 3.10.1.2 2.4.13.1 U U Lot 2
Solderability J-STD-003
3.10.1.3 U U 3 Months 3
Edge Dip
Chemical Resistance3 3.10.1.4 2.3.4.2 U U Lot 1
3
Metal Surface Cleanability 3.10.1.5 2.3.1.1 U U Lot 1
Tg3 2.4.24
3.10.1.6 U U Lot 1
2.4.25
Delta Tg3 3.10.1.7 2.4.25 U Lot 1
3
X/Y CTE 2.4.41
3.10.1.8 U Lot 1
2.4.41.1
Electrical
Permittivity4 (1 MHz) 2.5.5.2
3.11.1.1 2.5.5.3 U U 1 Month 3
2.5.5.9
Loss Tangent4 2.5.5.2
3.11.1.2 2.5.5.3 U U 1 Month 3
2.5.5.9
Volume Resistivity 3.11.1.3 2.5.17.1 U U 12 Months 6
Surface Resistivity 3.11.1.4 2.5.17.1 U U 12 Months 6
Arc Resistance 3.11.1.5 2.5.1 U U 12 Months 3
Dielectric Breakdown 3.11.1.6 2.5.6 U U 3 Months 36
Electric Strength 3.11.1.7 2.5.6.2 U U 3 Months 3

6
December 2001 IPC-4101A

Table 3-1 Reference Information and Test Frequency of Laminate (continued)

Conformance Specimens
Requirement Test1 Qualification Conformance Testing per Sheet
Tests Paragraph Method Testing Testing Frequency Sampled
Environmental
Moisture Absorption 3.12.1.1 2.6.2.1 U U 3 Months 4
Fungus Resistance 3.12.1.2 2.6.1 U 1
Pressure Vessel3,4 3.12.1.3 2.6.16 U Lot 3
4
Total Halogen Content 3.10.1.9 TBD U
CAF Growth Resistance4 3.12.1.4 TBD U
1
All methods are from IPC-TM-650 unless otherwise noted.
2
The following are audit requirements for visual properties.
Lot Size Sample Acceptance
Size Number
2 to 50 5 0
51 to 90 7 0
91 to 150 11 0
151 to 280 13 0
281 to 500 16 0
501 to 1,200 19 0
1,201 to 3,200 23 0
3,201 to 10,000 29 0
3
Optional tests as agreed upon between user and supplier.
4
Applicable to specific material only.
5
One lengthwise and one crosswise specimen for each side; four total for double sided.
6
One additional sample will be prepared for initial voltage reading for step-by-step testing.
7
Three lengthwise and three crosswise specimen.
8
All lengthwise specimens.
9
The supplier shall use a statistical sampling plan to assure conformance to dimensional requirements.
10
Flammability qualification testing is to be conducted on cured 0.80 mm [0.0315 in] and 1.60 mm [0.0630 in] samples, which automatically qualifies prepreg
and thin laminate. Flammability conformance testing is to be conducted on cured samples >0.5 mm [0.020 in].
11
Nominal value to be agreed upon between user and supplier.
12
The UL94 test for flammability is to be used with the optional conditioning of 24 hours at 125°C allowed.
13
Note that a minimum laminate thickness requirement of 0.79 mm [0.0311 in] exists in Method 2.4.4 to correctly measure the flexural strength. This thickness
requirement takes precedence over the ≥0.50 mm callout in all specifications sheets for the flexural strength measurements.

3.1.15 AABUS Acronym defines ‘‘as agreed upon fication using the test methods described herein. Qualifica-
between user and supplier.’’ tion testing shall be performed to demonstrate the suppli-
er’s ability to meet all of the requirements of each
3.1.16 Filler A substance that is added to a material to
applicable specification sheet for each base material. Mate-
improve its solidary, bulk or other properties.
rials listed on a Qualified Products List (QPL) for MIL-S-
3.2 Specification Sheets The individual item require- 13949 as of November, 30 1998 are considered to be quali-
ments shall be as specified herein and in accordance with fied to the extent of the original qualification and consistent
the applicable specification sheets. Where there is no speci- with 3.4.1, provided the test information is available for
fication sheet available, the individual requirements shall review.
be as specified in complementary documents such as mas-
ter drawings or ordering data sheets (see 6.1). In the event 3.4.1 Qualification Testing of Laminate Qualification of
of any conflict between requirements of this specification laminates shall require test data for both thin and thick
sheet and a complementary document, the latter shall gov- materials. One set of test information for laminate 0.10 mm
ern. [0.004 in] or thinner shall qualify all laminate thicknesses
up to and including 0.50 mm [0.0197 in]. If the thinnest
3.3 Manufacturer Quality Profile Suppliers of laminates
thickness tested is >0.10 mm [0.004 in], but <0.50mm
and prepregs shall assess their manufacturing capability
[0.0197 in], all laminates from that thickness up to and
and complete IPC-1730. The laminator qualification profile
including 0.50 mm [0.0197 in] shall qualify all laminates
shall be reviewed and updated on a two-year basis at a
included in that range. One set of test information for a
minimum. The laminator qualification profile shall be
laminate ≥0.8 mm [0.0315 in] shall qualify the manufac-
made available for review upon request.
turer for thick laminate materials.
3.4 Qualification Testing Laminate and prepreg base
materials furnished under this specification shall be quali- 3.4.2 Qualification Testing of Prepreg Qualification of
fied as described in Table 3-1 for laminates and Table 3-2 the prepreg comprised of the thinnest reinforcement style
for prepregs. The supplier shall retain on file supporting automatically qualifies by extension all the thicker rein-
data that the materials meet the requirements of this speci- forcement styles for a given specification sheet.

7
IPC-4101A December 2001

Table 3-2 Reference Information and Test Frequency of Prepreg

Conformance Specimens
Requirement Test1 Qualification Conformance Testing per Unit
Tests Paragraph Method Testing Testing Frequency sampled
General
Visual Properties 3.8.3.2 2.1.5 U U Lot 1
Dimensional
Length/Width 3.8.4.1.2 2.2.19.1 U U Audit6
Squareness 3.8.4.1.2 2.2.19.1 U U Audit6
Physical
Resin Content Percent by
3.9.2.1.1 2.3.16.1 U Lot 1
Treated Weight2
Resin Content Percent by
3.9.2.1.2 2.3.16 U U Lot 1
Burn-Off2
2
Treated Weight Total 3.9.2.1.3 2.3.16.2 U Lot 1
3
Resin Flow Percent 3.9.2.2.1 2.3.17 U U Lot 1
Scaled Flow Thickness3 3.9.2.2.2 2.4.38 U U Lot 1
No Flow 3.9.2.2.3 2.3.17.2 U U Lot 1
Rheological Flow 3.9.2.2.4 AABUS7 U Lot 1
Delta H 3.9.2.2.5 AABUS7 U Lot 1
7
Percent Cure 3.9.2.2.6 AABUS U Lot 1
Gel Time4 3.9.2.2.7 2.3.18 U U Lot 1
Volatile Content4 3.9.2.2.8 2.3.19 U U Lot 1
Chemical
Flammability8,9,10 3.10.2.1 UL94 U U 1 Month 5
Chemical Resistance4,9 3.10.2.2 2.3.4.2 U Lot
Presence of Dicy4 3.10.2.3 2.1.10 U U Lot 1
Electrical
Permittivity5,9 2.5.5.2
3.11.2.1 2.5.5.3 U 1 Month 3
2.5.5.9
Loss Tangent5,9 2.5.5.2
3.11.2.2 2.5.5.3 U 1 Month 3
2.5.5.9
Electric Strength9 3.11.2.3 2.5.6.2 U U 3 Months 3
Environmental
Fungus Resistance9 3.12.2.1 2.6.1 U
4,9
CAF Growth Resistance 3.12.2.2 TBD U
1
All methods are from IPC-TM-650 unless otherwise noted.
2
For qualification purposes, resin content shall be in accordance with Resin Content Percent by Burn Off. For conformance testing, resin content may be
determined using IPC-TM-650, Test Methods 2.3.16, 2.3.16.1 or 2.3.16.2.
3
For prepreg types other than no flow prepreg, either resin flow percent or scaled flow thickness may be specified for qualification and conformance testing.
4
Optional tests are agreed upon between user and supplier.
5
Applicable to specific material only.
6
Supplier shall use a statistical sampling plan to assure conformance to dimensional specifications.
7
AABUS = As Agreed Upon Between User and Supplier.
8
For flammability see Footnote 10 of Table 3-1. Prepreg conformance is satisfied by testing laminate samples from the same specification sheet.
9
Tests to be conducted after pressing the prepreg into a laminate.
10
The UL94 test for flammability is to be used with the optional conditioning of 24 hours at 125°C allowed.
Note: If the same glass style of prepreg is used to make thin core laminate, testing of the laminate only is required.

8
December 2001 IPC-4101A

3.5 Verification of Manufacturer’s Quality System The working area of a fabricated sheet is considered to be the
verification of the manufacturer’s quality system, as out- area inside a 25 mm [0.984 in] border around the perimeter
lined in the self declaration in IPC-1730, may be conducted of the sheet.
to reduce risk to the buyer. The verification can be accom-
plished via several methods, including internal assessment, 3.8.1.2 Fabricated Laminate Panel Material A fabri-
individual customer audit, and/or third party assessment. cated panel shall be any size <0.55 m2[5.92 ft2]. The work-
ing area of a fabricated panel is considered to be the area
3.6 Conflict In the event of conflict, the following order inside a 13 mm [0.512 in] border around the perimeter of
of precedence shall apply: the panel.
1. Purchase order
2. Master drawing (see 6.1.1-D or 6.1.2-D) 3.8.1.3 Fabricated Prepreg Panels Fabricated panels
are cut-to-size pieces of prepreg that are nominally (length
3. This specification (specification sheets take precedence
x width, excluding considerations of tooling holes or other
over body of text)
cut-outs) <0.55 m2 [5.92 ft2]. The working border shall be
4. Applicable documents (see Section 2) the area excluding a 15 ± 3 mm [0.591 ± 0.118 in] border.
3.7 Materials
3.8.1.4 Fabricated Prepreg Rolls Prepreg rolls are con-
3.7.1 Metal Cladding Metal cladding shall meet the
tinuous lengths of prepreg that are rolled for the purpose of
requirements of IPC-4562, IPC-CF-148, IPC-CF-152, or as inventory and custom fabrication by the user. The working
agreed upon between user and supplier. For alternate metal area shall exclude the outer 25 ± 5 mm [0.984 ± 0.197 in]
claddings not covered by industry standards, requirements edge.
shall be as agreed upon between user and supplier. No more than 5% of the nominal roll length shall be
unsuitable for panel fabrication, which includes splices,
3.7.2 Reinforcement Fabric Construction of reinforce- areas sampled for testing, and non-splice breaks in the con-
ment fabrics shall be in accordance with IPC-4412, IPC- tinuous length of the prepreg. The length of the roll may be
SG-141, IPC-A-142, IPC-4411, IPC-4110, IPC-4130 and compensated to replace that prepreg unsuitable for panel
IPC-QF-143. For alternate reinforcement types not covered fabrication as agreed upon between user and supplier.
by industry standards, requirements shall be as agreed
upon between user and supplier. 3.8.2 Inspection Lot

3.7.3 Resin Systems Resin systems used to produce 3.8.2.1 Inspection Lot for Laminate An inspection lot of
laminate and prepreg base materials under this specification laminate shall meet the following criteria:
shall be as specified in the individual specification sheets
a) Material covered by a single specification sheet and the
(see 1.1.1). For alternate resin systems not covered by this
same metal cladding type
specification, requirements shall be as agreed upon
between user and supplier. b) One press load or 200 sheets, whichever is greater. The
200 sheets must be comprised of consecutive press
3.8 General Requirements Laminate or prepreg base loads of the same material covered by a single specifi-
materials shall be considered acceptable if they meet the cation sheet and the same metal cladding type.
requirements listed below and in the applicable specifica-
tion sheet, or as agreed upon between user and supplier. 3.8.2.2 Inspection Lot for Prepreg An inspection lot of
Requirements only apply to the working area defined in prepreg shall be one master roll of reinforcement as pro-
3.8.1.1 through 3.8.1.4, unless otherwise specified. Both vided by the supplier. Splices provided by the reinforce-
sides of double-sided laminate base material shall be ment supplier are not considered to be a change in the
evaluated for those requirements that are impacted by the master roll. Each master roll shall be inspected at the
metal/base material relationships. See specific test methods beginning and end as a minimum. A significant parameter
for applicability. change to the impregnation process as agreed upon by user
and supplier shall require an additional prepreg inspection
Note: When tests are performed by the procuring activity,
point.
prepreg should be properly stored per 3.17 and tested as
soon as possible after receipt (not to exceed five days).
3.8.2.3 Preparation of Samples Unless otherwise speci-
3.8.1 Fabricated Sheets and Panels fied herein, samples and test specimens shall be prepared
in accordance with standard in-house procedures. If a ref-
3.8.1.1 Fabricated Laminate Sheet Material A fabri- eree method is required, it shall be as agreed upon between
cated sheet shall be any size ≥0.55 m [5.92 ft2]. The
2
user and supplier.

9
IPC-4101A December 2001

3.8.2.4 Etching Process and Etchant Removal for Cop- There shall be no adherent material in an indentation or
per Foil Specimens Unless otherwise specified, any stan- exposure of base laminate. Requirements for foil indenta-
dard procedure may be used; however, IPC-TM-650, Meth- tions do not apply to copper that has been treated on both
ods 2.3.6, 2.3.7, or 2.3.7.1 shall be used as a referee. sides. Class A applies, unless otherwise specified.

3.8.2.5 Standard Laboratory Conditions Unless other- 3.8.3.1.2 Wrinkles There shall be no metal-clad
wise specified herein, all inspections shall be performed in wrinkles, as seen under normal or corrected 20/20 vision of
accordance with the test and laboratory conditions specified the sheet or panel.
in IPC-QL-653.
3.8.3.1.3 Scratches Scratches are not permitted where
3.8.3 Visual Properties any part of the defect is ≥20% of the nominal foil thickness
(i.e., 3.4 µm [0.134 mil] for 17 µm [0.669 mil] copper) or
3.8.3.1 Laminate Visual Properties The specimen shall have more than five occurrences per 300 mm x 300 mm
be tested in accordance with Table 3-1 for laminates. [11.81 in x 11.81 in]. Any scratch with a depth <5% of the
Unless otherwise specified, the working area of the speci- nominal foil thickness shall not be counted, regardless of
men shall be examined with normal or corrected 20/20 length. The maximum allowable scratch length is 100 mm
vision. The worst 50 mm x 50 mm [1.97 in x 1.97 in] shall [3.937 in] for any scratch with a depth ≥5% and <20% of
be examined at 10X magnification. Visual inspection may the nominal foil thickness.
be carried out under ambient temperature and humidity
conditions. 3.8.3.1.4 Plastic Surface Finish of Metal-Clad Single-
Sided Base Material The plastic surface on the unclad
3.8.3.1.1 Foil Indentations Indentations shall be located
side of base materials shall be as produced by the curing
visually using normal or corrected 20/20 vision. The long- process. There shall be no evidence of resin-starved or
est dimension of each foil indentation in a specimen shall scorched areas.
be measured with a suitable reticule on a minimum 4X
magnifier, with referee inspections at 10X. A point value
3.8.3.1.5 Surface Finish of Foil after Curing – Except
shall be allocated according to the longest dimension as
Double Treat Unless otherwise specified (see 6.1.1-J),
specified in Table 3-3.
discoloration of the copper surface as a result of the curing
Table 3-3 Point Value for Longest process shall be acceptable.
Dimensions of Indentation
Longest Dimension (mm) [in] Point Value
3.8.3.1.6 Surface and Subsurface Imperfections Etched
0.13 to 0.25 [0.005 to 0.009] 1 panels shall be inspected to verify no subsurface imperfec-
0.26 to 0.50 [0.009 to 0.019] 2 tions in excess of those shown below are present. The pan-
0.51 to 0.75 [0.019 to 0.029] 4 els shall be inspected using an optical apparatus or aid that
0.76 to 1.00 [0.029 to 0.039] 7 provides a minimum magnification of 4X. Referee magni-
>1.00 [0.039] 30 fication shall be accomplished at 10X. Lighting conditions
of inspection shall be appropriate to the type, grade, and
The surface quality class (see 1.1.5 and 6.1.1-F) shall be thickness being inspected or as agreed between user and
determined by the total point count of foil indentations supplier.
within 300 mm x 300 mm [11.81 in x 11.81 in] as speci-
Surface and subsurface imperfections (i.e., weave texture,
fied in Table 3-4.
resin saturation, scorching, voids, or foreign inclusions)
Table 3-4 Surface Quality Classification shall be acceptable, provided the imperfections meet the
Surface Quality Maximum Point following:
Class Count Other Requirements
a. The reinforcement fiber is not cut or exposed.
Class A1 29
b. There is not more than one piece of residual surface
Class B 17
metal after metal removal per 0.55 m2 [5.92 ft2] of sur-
Class C 5 Longest Dimensions
≤380 µm [14.96 mil] face examined, and this piece shall not have an area
greater than that of a circle 0.125 mm [0.0049 in] in
Class D2 0 Longest Dimensions
<125 µm [4.92 mil] diameter.
Resin spots = 0 c. Encapsulated metallic particles of any size are not
Class X AABUS allowed.
1
Class A requirements shall apply, unless otherwise specified.
2
If Class D is specified, other quality related features are also required of d. The imperfections do not propagate as a result of ther-
this quality class per IPC-4562. mal stress.

10
December 2001 IPC-4101A

e. The foreign inclusions are translucent. 3.8.4.1.1 Length and Width of Laminate For laminate
f. Opaque foreign fibers are ≤13 mm [0.512 in] in length base materials, the manufacturer’s standard sizes between
and average no more than one per 300 mm x 300 mm 0.45 m [1.48 ft] and 3.6 m [11.8 ft] in length and 0.45 m
[11.81 in x 11.81 in] inspected. [1.48 ft] and 1.5 m [4.92 ft] in width shall be acceptable.
The length and width may vary no more than ± 25 mm
g. Opaque foreign matter other than fibers shall not
[0.984 in] from the standard size. Unless specific dimen-
exceed 0.50 mm [0.019 in]. Opaque foreign inclusions
sions are specified, standard size metal-clad laminate from
<0.13 mm [0.005 in] shall not be counted. Opaque for-
which test specimens have been cut shall be acceptable.
eign inclusions between 0.50 mm [0.019 in] and 0.13
When smaller sizes are cut from standard sizes, the permis-
mm [0.005 in] inclusive shall average no more than
sible variations from the specified length or width shall be
two spots per 300 mm x 300 mm [11.81 in x 11.81 in]
as specified in Table 3-5 or as agreed upon between user
inspected.
and supplier. Adjacent edges must be perpendicular within
h. Voids are <0.075 mm [0.0029 in] in the longest dimen- 0.075 mm [0.0029 in] per 25 mm [0.984 in] for laminate.
sion and do not occur in void clusters any more than
three voids in a 3.2 mm [0.125 in] diameter circle. 3.8.4.1.2 Length and Width of Prepreg The length and
width of prepreg panels shall be as specified in the pro-
3.8.3.2 Prepreg Visual Properties The specimen shall
curement document (see 6.1.2-H). The permissible varia-
be tested in accordance with Table 3-2 for prepregs.
tions from the specified length or width shall be as speci-
Prepreg visual inspection is conducted with normal or cor-
fied in Table 3-6 or as agreed upon between user and
rected 20/20 vision.
supplier. Adjacent edges shall be perpendicular, within
3.8.3.2.1 Inclusions Metallic inclusions are not accept- 0.13 mm [0.00512 in] per 25 mm [0.984 in].
able. Nonmetallic inclusions or foreign material shall be
3.8.4.1.3 Prepreg Roll Width For prepreg base materi-
acceptable, provided they are <0.50 mm [0.019 in] in the
als, the width of the rolls shall be as specified in the pro-
longest dimension and occur no more frequently than two
curement document (see 6.1.2-H). The width of the mate-
per 300 mm x 300 mm [11.81 in x 11.81 in] of surface for
rial shall be within +6.4/-0.0 mm of the specified value
the panel size inspected or a 610 mm [24.02 in] x width
[+0.252/-0.000 in].
sample.

3.8.3.2.2 Impregnation Imperfections Imperfections in 3.8.4.1.4 Prepreg Roll Length The length of the prepreg
impregnation shall be acceptable, provided the following rolls shall be as specified in the procurement document
criteria are met. (see 6.1.2-H). The length shall be within ± 1% of the value
specified.
a. Overall prepreg thickness increases from reinforcement
imperfections is 99% maximum. 3.8.4.2 Thickness
b. Dewetted areas (measured in at least two dimensions)
are 2.3 mm [0.091 in] maximum. 3.8.4.2.1 Class A, B, and C Laminate Materials For
c. Pin-holed areas are 0.65 mm [0.026 in] maximum. Class A, Class B, and Class C laminate materials, the thick-
ness of the laminate base material without the metal clad-
d. Reinforcement distortion (variation in pick line) per
ding shall be measured with a micrometer (see Figure 3-1).
300 mm [11.81 in] distance is 25 mm [0.984 in] maxi-
mum.
3.8.4.2.2 Class D Laminate Materials For Class D
e. Creases with exposed reinforcement are 15 mm [0.591 materials, thickness shall be determined by microsection in
in] maximum. accordance with Table 3-7. Three microsections shall be
f. Silver streaks and cigar voids (non-wetted fibers) are done on each specimen. Each microsection shall be located
not present. at independent corners of the specimen and no closer than
g. Brown streaks (binder marks) are not present. 25 mm [0.984 in] from any edge. The base thickness shall
be measured in accordance with Figure 3-1 and taken at the
3.8.4 Dimensional Length, width, thickness, and other closest point between metal claddings (see Figure 3-1).
dimensional characteristics shall be measured with equip-
ment capable of sufficient accuracy to verify the require- 3.8.4.2.3 Class K, L, M Laminate Materials For Class
ments of this specification. K, Class L, and Class M materials, the thickness of the
laminate with the metal cladding shall be measured with a
3.8.4.1 Length and Width When tested in accordance micrometer (see Figure 3-1).
with Table 3-1 or Table 3-2 as applicable, the material shall
meet the length and width requirements specified in 3.8.4.2.4 Thickness Tolerance of Laminate Materials
3.8.4.1.1 through 3.8.4.1.4. The thickness of the laminate within the working area shall

11
IPC-4101A December 2001

Table 3-5 Permissible Variation in Length and Width of Laminates

Panels
<300 mm [11.81 in] ± 0.8 mm [0.031 in]
300 to 600 mm [11.81 to 23.62 in] ± 1.6 mm [0.063 in]
>600 mm [23.62 in] ± 3.2 mm [0.126 in]
Manufacturer’s standard size with +25.0/-0.0 mm [+0.984/-0.000 in]
0.45 m ≤ Width ≤1.5 m [1.48 ft ≤ Width ≤4.92 ft]
0.45 m ≤ Length ≤3.6 m [1.48 ft ≤ Length ≤11.8 ft]

Table 3-6 Permissible Variation in Length and Width of Prepregs

Panels Grade A1 Grade B
<300 mm [11.81 in] ± 1.6 mm [0.063 in] ± 0.8 mm [0.031 in]
300 to 600 mm [11.81 to 23.62 in] ± 3.2 mm [0.126 in] ± 1.6 mm [0.063 in]
>600 mm [23.62 in] ± 6.4 mm [0.252 in] ± 3.2 mm [0.126 in]
Rolls
Width +6.4/-0.0 mm [+0.252/-0.000 in]
Length ± 1% of specified value
1
Grade A requirements shall apply, unless otherwise specified.

IPC-4101-1

Figure 3-1 Thickness Measurements for Laminates

12
December 2001 IPC-4101A

be in accordance with Table 3-7 . The thickness outside the will not impart additional bow or twist to the specimen
working area of the laminate sheet or cut-to-size panel sup- (i.e., when shearing, test specimen sheared edges shall be
plied by the supplier shall not vary from the nominal by a those on the shear deck side of each cut).
value >125% of the specified tolerance. Unless otherwise
specified, Class A/K requirements shall apply. 3.8.4.3.2 Panels with One or Both Dimensions <300 mm
[11.81 in] If both dimensions are <300 mm [11.81 in],
3.8.4.3 Bow and Twist of Laminate Materials When use an as-received panel as the test specimen. If one
specimens are tested in accordance with Table 3-1, permis- dimension is >300 mm [11.81 in], cut back to 300 mm
sible bow and twist shall be as defined in Table 3-8, or as [11.81 in].
agreed upon between user and supplier. This requirement
3.9 Physical Requirements
does not apply to double-sided laminate with a dielectric
thickness <0.50 mm [0.019 in] or with unequal cladding of 3.9.1 Physical Requirements of Laminate Materials
>0.065 mm [0.0025 in] thickness between the two sides.
3.9.1.1 Peel Strength When specimens are tested in
3.8.4.3.1 Sheets and Panels with Both Dimensions ≥300 accordance with Table 3-1, peel strength for all copper
mm [11.81 in] Fabricate a 300 mm x 300 mm [11.81 in x types shall meet the requirements of 3.9.1.1.1 through
11.81 in] specimen from a sheet or panel in a manner that 3.9.1.1.3. For non-copper metallic foils, adhesion test

Table 3-7 Thickness and Tolerances for Laminates

Nominal Thickness of Class A/K Class B/L Class C/M Class D
Laminate (mm) [in] (mm) [in] (mm) [in] (mm) [in] (mm) [in]
0.025 to 0.119 ± 0.018 ± 0.018 ± 0.013 -0.013 [-0.0005]
[0.0009 to 0.0047] [± 0.0007] [± 0.0007] [± 0.0005] + 0.025 [+ 0.0009]
0.120 to 0.164 ± 0.038 ± 0.025 ± 0.018 -0.018 [-0.0007]
[0.0047 to 0.0065] [± 0.0015] [± 0.0009] [± 0.0007] + 0.030 [+ 0.0012]
0.165 to 0.299 ± 0.050 ± 0.038 ± 0.025 -0.025 [-0.0009]
[0.0065 to 0.0118] [± 0.0019] [± 0.0015] [± 0.0009] + 0.038 [+ 0.0015]
0.300 to 0.499 ± 0.064 ± 0.050 ± 0.038 -0.038 [-0.0015]
[0.0118 to 0.0196] [± 0.0025] [± 0.0019] [± 0.0015] + 0.050 [+ 0.019]
0.500 to 0.785 ± 0.075 ± 0.064 ± 0.050 -0.050 [-0.019]
[0.0197 to 0.0309] [± 0.0029] [± 0.0025] [± 0.0019] + 0.064 [+ 0.0025]
0.786 to 1.039 ± 0.165 ± 0.10 ± 0.075
N/A
[0.0309 to 0.04091] [± 0.0065] [± 0.004] [± 0.0029]
1.040 to 1.674 ± 0.190 ± 0.13 ± 0.075
N/A
[0.04091 to 0.06594] [± 0.0075] [± 0.005] [± 0.0029]
1.675 to 2.564 ± 0.23 ± 0.18 ± 0.10
N/A
[0.06594 to 0.10094] [± 0.009] [± 0.007] [± 0.004]
2.565 to 3.579 ± 0.30 ± 0.23 ± 0.13
N/A
[0.10094 to 0.14091] [± 0.012] [± 0.009] [± 0.00512]
3.580 to 6.35 ± 0.56 ± 0.30 ± 0.15 N/A
[0.14094 to 0.250] [± 0.022] [± 0.012] [± 0.006]

Table 3-8 Permissible Bow and Twist for Laminates, %

For Laminate with Thickness, 0.50 mm ≤ t ≤0.78 mm [0.0197 in ≤ t ≤0.0307 in]
Single Sided Panel Size, l ≤200 mm [7.874 in] 2.0%
Single Sided Panel Size, 200 mm < l ≤300 mm [7.874 in < l ≤11.81 in] 2.0%
Double Sided Panel Size, l ≤200 mm [7.874 in] 1.0%
Double Sided Panel Size, 200 mm < l ≤300 mm [7.874 in < l ≤11.81 in] 1.5%
For Laminate with Thickness, 0.78 mm < t ≤1.67 mm [0.0307 in < t ≤0.0657 in]
Single Sided Panel Size, l ≤200 mm [7.874 in] 1.5%
Single Sided Panel Size, 200 mm < l ≤300 mm [7.874 in < l ≤11.81 in] 1.5%
Double Sided Panel Size, l ≤200 mm [7.874 in] 0.5%
Double Sided Panel Size, 200 mm < l ≤300 mm [7.874 in < l ≤11.81 in] 1.0%
For Laminate with Thickness, t >1.67 mm [t >0.0657 in]
Single Sided Panel Size, l ≤200 mm [7.874 in] 1.5%
Single Sided Panel Size, 200 mm < l ≤300 mm [7.874 in < l ≤11.81 in] 1.5%
Double Sided Panel Size, l ≤200 mm [7.874 in] 0.5%
Double Sided Panel Size, 200 mm < l ≤300 mm [7.874 in < l ≤11.81 in] 1.0%

13
IPC-4101A December 2001

methods and values shall be as agreed upon between user 3.9.2.1.1 Resin Content Percent (RC) (by Treated
and supplier. Weight) When specimens are tested in accordance with
Table 3-2, the percentage of resin content shall be as indi-
All foil weights may be plated up to 35 µm [0.001 in] and
cated on the applicable specification sheet or as agreed
the peel strength tested to the original specified value.
upon between user and supplier. In the case of any dispute,
the referee test method will be in accordance with IPC-
3.9.1.1.1 Peel Strength after Thermal Stress When TM-650, Method 2.3.16.1 (see 3.9.2.1.2).
specimens are tested in accordance with Table 3-1, the
minimum average peel strength following thermal stress
3.9.2.1.2 Resin Content Percent (RC) (by Burn-Off)
shall be as indicated in the applicable specification sheet.
When specimens are tested in accordance with Table 3-2,
the percentage of resin content shall be as indicated on the
3.9.1.1.2 Peel Strength at Elevated Temperature applicable specification sheet or as agreed upon between
When specimens are tested in accordance with Table 3-1, user and supplier.
the specimens shall meet the requirements of the appli-
cable specification sheet. 3.9.2.1.3 Treated Weight Total (TW) When specimens
are tested in accordance with Table 3-2, the total treated
3.9.1.1.3 Peel Strength after Process Chemicals weight of the resin and reinforcement combined shall be as
(Optional) When specimens are tested in accordance with indicated on the applicable specification sheet or as agreed
Table 3-1, the minimum average peel strength after process upon between user and supplier.
solutions shall be as indicated in the applicable specifica-
tion sheet. 3.9.2.1.4 Variation Within a Panel Resin content varia-
tion shall be no greater than that specified in the applicable
3.9.1.2 Dimensional Stability When specimens are specification sheet or as agreed upon between user and
tested in accordance with Table 3-1, the nominal dimen- supplier.
sional stability shall be as agreed upon between user and
supplier. The tolerance shall be Range A unless otherwise 3.9.2.2 Flow Parameter The amount the resin will flow
specified on the purchase order or by other agreement under certain controlled conditions shall be specified by
between user and supplier: resin flow percent (MF), scaled flow thickness (SC), no
flow (NF), rheological flow (RE), delta H (DH), or percent
Range A ± 300 ppm (0.0003 cm/cm [0.0003 in/in])
cure (PC) as indicated on the procurement document or as
Range B ± 200 ppm (0.0002 cm/cm [0.0002 in/in])
agreed upon between user and supplier.
Range C ± 100 ppm (0.0001 cm/cm [0.0001 in/in])
Range X Unspecified, not applicable or as agreed upon
between user and supplier. 3.9.2.2.1 Resin Flow Percent (MF) When specimens are
tested in accordance with Table 3-2, the nominal resin flow
percent shall be as indicated on the procurement document,
3.9.1.3 Flexural Strength The metal cladding of speci-
and the tolerance of the resin flow percent measurement
mens shall be completely removed by etching in accor-
shall meet the requirements of the applicable specification
dance with 3.8.2.4. When specimens are tested in accor-
sheet or as agreed upon between user and supplier.
dance with Table 3-1, the average minimum flexural
strength shall be as indicated in the applicable specification
3.9.2.2.2 Scaled Flow Thickness (SC) When specimens
sheet.
are tested in accordance with Table 3-2, the nominal per
ply thickness shall be as indicated on the procurement
3.9.1.4 Flexural Strength at Elevated Temperature The document. The per ply thickness shall not vary from the
metal cladding of the specimens shall be completely nominal thickness more than specified on the applicable
removed by etching in accordance with 3.8.2.4. When specification sheet or as agreed upon between user and
specimens are tested in accordance with Table 3-1, the supplier.
average minimum flexural strength at elevated temperature
shall be as indicated in the applicable specification sheet.
3.9.2.2.3 No Flow (NF) When specimens are tested in
accordance with Table 3-2, the nominal resin flow range
3.9.2 Physical Requirements of Prepreg Materials for no flow shall be as indicated on the procurement docu-
ment. The resin flow percent for no flow shall not vary
3.9.2.1 Resin Content The quantity of resin on a par- from the nominal value more than specified on the appli-
ticular reinforcement shall be specified by resin content or cable specification sheet or as agreed upon between user
total treated weight. and supplier.

14
December 2001 IPC-4101A

3.9.2.2.4 Rheological Flow (RE) When specimens are Table 3-9 Flammability Requirements
tested in accordance with Table 3-2, the nominal rheologi- Property Requirement
cal flow and tolerance shall be as indicated in the procure- Designation
ment document or as agreed upon between user and Flammability V-0 V-1
supplier.
Flaming combustion time ≤10 seconds ≤30 seconds
after each application of the
3.9.2.2.5 Delta H (DH) When specimens are tested in flame for each test speci-
men
accordance with Table 3-2, the nominal delta H and toler-
ance shall be as indicated in the procurement document or Total flaming combustion <50 seconds <250 seconds
time for the 10 flame appli-
as agreed upon between user and supplier. cations for each set of five
specimens
3.9.2.2.6 Percent Cure (PC) When specimens are tested Glowing combustion time ≤30 seconds ≤60 seconds
in accordance with Table 3-2, the nominal cure percent and after the second removal of
the test flame
tolerance shall be as indicated in the procurement docu-
Flaming or glowing combus- None None
ment or as agreed upon between user and supplier.
tion up to the holding clamp
Dripping flaming particles None None
3.9.2.2.7 Gel Time (GT) (Optional Test) When speci- that ignite the tissue paper
mens are tested in accordance with Table 3-2, the nominal
gel time shall be as indicated on the procurement docu- Specimens 75 mm x 75 mm [2.95 in x 2.95 in] shall be cut,
ment. The gel time shall not vary from the nominal gel wiped with isopropyl alcohol, and immersed in a 20% by
time more than specified on the applicable specification volume solution of hydrochloric acid, technical grade,
sheet or as agreed upon between user and supplier. 5.6°C Baume, maintained at 21°C ± 5°C [69.8°F ± 9°F] for
15 seconds. The specimens shall be rinsed with a cold
3.9.2.2.8 Volatile Content (VC) (Optional Test) When water spray rinse for five seconds and blown dry with fil-
specimens are tested in accordance with Table 3-2, the tered, oil free, compressed air.
volatile content shall not exceed the maximum as indicated
on the applicable specification sheet or as agreed upon 3.10.1.4 Chemical Resistance (Optional) When speci-
between user and supplier. mens are tested in accordance with Table 3-1, the weight
change following chemical exposure shall be as agreed
3.10 Chemical Requirements upon between user and supplier.

3.10.1 Chemical Requirements of Laminate Materials 3.10.1.5 Metal Surfaces Cleanability When specimens
are tested in accordance with Table 3-1, the material shall
3.10.1.1 Flammability When specimens are tested in meet the metal surface cleanability requirements as agreed
accordance with Table 3-1 and UL94 flammability require- upon between user and supplier.
ments, the rating shall be as indicated in the applicable
specification sheet and Table 3-9. The optional condition- 3.10.1.6 Glass Transition Temperature (Tg) (Optional)
ing of 24 hours at 125°C is acceptable for materials When specimens are tested in accordance with Table 3-1,
described in this document. the Tg shall meet the values as agreed upon between user
If applicable specification sheet indicates not applicable and supplier.
(N/A), no requirement, or as agreed upon between user and
supplier (AABUS), the materials must be tested for flam- 3.10.1.7 Delta Tg (Optional) When specimens are tested
mability and results recorded during the qualification pro- in accordance with Table 3-1, the delta Tg shall meet the
cess. values as agreed upon between user and supplier.

3.10.1.2 Thermal Stress When specimens are tested in 3.10.1.8 Coefficient of Thermal Expansion (CTE)
accordance with Table 3-1, the specimens shall exhibit no (Optional) When specimens are tested in accordance with
evidence of blistering, delamination, wrinkling, or crack- Table 3-1, the X/Y CTE shall meet the values as agreed
ing. upon between user and supplier.

3.10.1.3 Solderability When laminates are tested as 3.10.1.9 Total Halogen Content (Optional) When speci-
specified in Table 3-1, the metal-clad surfaces shall not mens are tested in accordance with Table 3-1, the total
exhibit non-wetting or more than 5% dewetting. Prior to halogen content shall meet the values specified in the
testing, specimens shall be cleaned as follows: applicable specification sheet.

15
IPC-4101A December 2001

3.10.2 Chemical Requirements of Prepreg Materials in 3.8.2.4. End point or failure occurs when a conducting
path is formed across the surface and the arc disappears
3.10.2.1 Flammability When laminated specimens are into the material. When specimens are tested in accordance
tested in accordance with Table 3-2 and UL94 flammabil- with Table 3-1, the average minimum arc resistance shall
ity requirements, the rating shall be as indicated in the be as indicated in the applicable specification sheet.
applicable specification sheet and Table 3-7. Prepreg must
be laminated to produce a minimum thickness of 0.50 mm 3.11.1.6 Dielectric Breakdown When specimens are
[0.020 in]. tested in accordance with Table 3-1, the dielectric break-
If the applicable specification sheet indicates not applicable down shall be as indicated in the applicable specification
(N/A), no requirement, or as agreed upon between user and sheet.
supplier (AABUS), the materials must be tested for flam-
3.11.1.7 Electric Strength When specimens are tested
mability and results recorded during the qualification pro-
in accordance with Table 3-1, the electric strength shall be
cess.
as indicated in the specification sheet.
3.10.2.2 Chemical Resistance (Optional) When speci-
3.11.2 Electrical Requirements of Prepreg Materials
mens are tested in accordance with Table 3-2, the weight
Electrical properties shall be tested on specimens cut from
change following chemical exposure shall be as agreed
fully cured two-ply samples of a minimum size of 150 mm
upon between user and supplier.
x 150 mm [5.91 in x 5.91 in] that have been prepared in
accordance with the manufacturer’s recommendations.
3.10.2.3 Presence of Dicyandiamide (Dicy) (Optional)
When specimens are tested in accordance with Table 3-2,
3.11.2.1 Permittivity When specimens are tested at 1
the amount of acceptable dicy crystals shall be as agreed
MHz in accordance with Table 3-2, the average maximum
upon between user and supplier
permittivity shall be as indicated in the applicable specifi-
3.11 Electrical Requirements cation sheet.

3.11.1 Electrical Requirements of Laminate Materials 3.11.2.2 Loss Tangent When specimens are tested at 1
MHz in accordance with Table 3-2, the average maximum
3.11.1.1 Permittivity When specimens are tested in loss tangent shall be as indicated in the applicable specifi-
accordance with Table 3-1, the average maximum permit- cation sheet.
tivity shall be as indicated in the applicable specification
sheet. Different test methods can be specified depending 3.11.2.3 Electric Strength When specimens are tested
upon the frequency (i.e., 1MHz, 1GHz, etc.) of the test. See in accordance with Table 3-2, the minimum electric
IPC-4121 for specific permittivity information by construc- strength shall be as indicated in the specification sheet.
tion and resin content.
3.12 Environmental Requirements
3.11.1.2 Loss Tangent When specimens are tested in
3.12.1 Environmental Requirements of Laminate
accordance with Table 3-1, the average maximum loss tan- Materials
gent shall be as indicated in the applicable specification
sheet. Different test methods can be specified depending 3.12.1.1 Moisture Absorption When specimens meeting
upon the frequency (i.e., 1MHz, 1GHz, etc.) of test. See the thickness requirements are tested in accordance with
IPC-4121 for specific loss tangent information by construc- Table 3-1, the average maximum moisture absorption shall
tion and resin content. be as indicated in the applicable specification sheet.

3.11.1.3 Volume Resistivity When specimens are tested 3.12.1.2 Fungus Resistance When tested in accordance
in accordance with Table 3-1, the minimum volume resis- with Table 3-1, the specimen shall resist fungus growth.
tivity shall be as indicated in the applicable specification
sheet. 3.12.1.3 Pressure Vessel (Optional) When tested in
accordance with Table 3-1, the specimens shall be evalu-
3.11.1.4 Surface Resistivity When specimens are tested ated using the criteria as agreed upon between user and
in accordance with Table 3-1, the minimum surface resis- supplier.
tivity shall be as indicated in the applicable specification
sheet. 3.12.1.4 Conductive Anodic Filament (CAF) Growth
(Optional) Conductive anodic filament (CAF) growth
3.11.1.5 Arc Resistance The metal cladding of speci- resistance is recognized as a significant material attribute.
mens shall be completely removed by etching as specified Requirements for CAF will be considered as a specification

16
December 2001 IPC-4101A

sheet element at such time that a standardized test method 3.14.3 Marking of Shipping Containers Laminate and
and performance level requirements are developed. Until prepreg sheets or cut-to-size panels shall have a shipping
then, the test method and performance level requirements label attached to the packing container. All labels shall
shall be as agreed upon between user and supplier. remain securely affixed and legible during normal han-
dling. Location of the label and the type of marking shall
3.12.2 Environmental Requirements of Prepreg be as specified in the drawing or ordering data or, if not
Materials specified, shall be the supplier’s standard labeling and
marking. The following information is to be included:
3.12.2.1 Fungus Resistance When tested for qualifica-
a. Specification number and type of material
tion in accordance with Table 3-2, the specimen shall resist
fungus growth. b. Manufacturer’s material designation and lot number
c. Quantity unit of issue and dimensions
3.13 Substitutability
d. Gross weight
3.13.1 Substitutability of Classes of Pits and Dents e. Date packed (date of packing for shipment to customer
Laminates inspected, certified, or marked to a tighter class or warehouse)
of pits and dents shall be substitutable for laminates f. Contract number and manufacturer’s source code num-
ordered to a lower class of pits and dents. ber, when applicable
g. Manufacturer’s name and address
3.13.2 Substitutability of Classes of Thickness Toler-
h. Date of manufacture (date when the material was
ance Laminates inspected, certified, or marked to a
impregnated)
tighter class of thickness tolerance shall be substitutable
for laminates ordered to a lower class of thickness toler- i. Prepreg parameters (to include as a minimum, the resin
ance. content precent or treated weight total, resin flow per-
cent or scaled flow thickness, as applicable)
3.13.3 Remarking of Substituted Laminates Substi-
tuted laminates provided under the provisions of the fore- 3.15 Workmanship Laminate and prepreg base materials
going requirements need not be remarked to lesser grades shall be manufactured and processed in such a manner as
or classes unless specified by the purchase order. Lot or to be uniform in quality and shall be free from defects
date codes shall not be changed (except as specified elsewhere in this specification) that
will affect processability, product life, and serviceability.
3.14 Marking
3.16 Material Safety Laminate and prepreg base materi-
3.14.1 Marking Laminate Materials Laminate sheets or als supplied to this specification shall have available a
cut-to-size panels shall be marked as specified in the order- Material Safety Data Sheet (MSDS) and other additional
ing data. When applicable, the need for marking, location safety information as appropriate upon request.
of the marking, information presented in the marking, and
the type of marking shall be specified. Types of acceptable
3.17 Prepreg Shelf Life Unless otherwise specified,
markings are:
prepreg supplied shall be capable and certified to meet all
A. Ink of non-corrosive types that shall remain legible the requirements specified when stored per Condition 1 or
during normal handling but readily removable prior to Condition 2 for the applicable specification sheet require-
fabrication, which will not affect the physical or elec- ments.
trical properties of the base material
Condition 1: Six months when stored at <5°C [41°F]
B. Ink of non-corrosive types that shall remain legible
during normal handling but act as an etch resist to per- Condition 2: Three months when stored at <20°C [68°F]
manently mark panels. and <50 % RH
C. Labels that remain securely affixed and legible during Prepreg exceeding the shelf life requirements prior to ship-
normal handling ment to the user must be retested and recertified by the
D. A metal embossing stamp or engraver. supplier or authorized distributor before the prepreg can be
sold as material in compliance with and certified to this
3.14.2 Marking Prepreg Materials Prepreg sheets or specification. For the purposes of retesting and recertifica-
panels shall have a label attached to the unit package. tion by the supplier or authorized distributor for sale as
Prepreg rolls shall have a label securely attached to the certified material, shelf life begins at the date of manufac-
compatible protective bag enveloping the roll and a label ture of the prepreg. Prepreg should be stored in the absence
attached to the inside mandrel at both ends. of a catalytic environment such as UV light or excessive

17
IPC-4101A December 2001

radiation. Prepreg should be allowed to equillibrate at pro- acteristics. It is the responsibility of the supplier to commu-
cessing conditions before use. nicate product changes that have the potential to change
performance properties or processing characteristics with
4 QUALITY ASSURANCE PROVISIONS the user. The product shall be requalified if deemed neces-
sary.
4.1 Quality System A quality system shall be docu-
mented to support the conformance testing frequency 4.3.5 Qualification Data Retention The qualification
selected by the laminate and prepreg manufacturer. data shall be maintained by the supplier for the commercial
life of the product plus three years.
4.2 Responsibility for Inspection Unless otherwise
specified in the purchase order, the supplier is responsible
4.4 Quality Conformance Inspection Quality conform-
for the performance of all inspection requirements as speci-
fied herein. Except as otherwise specified in the purchase ance inspection shall be as documented in the laminate and
order, the supplier may use his own or any other facility prepreg supplier’s manufacturing quality system. If a docu-
suitable for the performance of the inspection requirements mented quality system does not exist, conformance testing
herein. shall be conducted in accordance with Table 3-1 for lami-
nates and Table 3-2 for prepregs. Additional testing
4.2.1 Test Equipment and Inspection Facilities Testing
required by the user must be included in the purchase
and measuring equipment and inspection facilities of suffi- order.
cient accuracy, quality, and quantity to permit performance
of the required inspection shall be established and main- 4.4.1 Frequency The frequency of conformance testing
tained by the supplier in accordance with IPC-QL-653. The shall be as specified in the Manufacturer’s Quality System
establishment and maintenance of a calibration system to or as specified in Table 3-1 for laminates, Table 3-2 for
control the accuracy of the measuring and test equipment prepregs, or by the purchase order. Where lot is indicated
shall be in accordance with ANSI/NCSL Z540-1-1994 or in Table 3-1, only one sheet is to be randomly selected
ISO 10012-1. from each lot for testing. Where ‘‘lot’’ is indicated for
Table 3-2 for prepreg, the sample shall be selected as
4.3 Qualification Testing specified in 3.8.2.2. Additional samples may be taken to
satisfy the terms of the purchase order.
4.3.1 Samples When required under the provisions of
When a period of one month or greater is indicated in
Table 3-1 for laminates and Table 3-2 for prepregs, sample
Table 3-1, the sampling plan shall be as described in Table
sheets shall be selected from normal production for each
4-1 for laminate and Table 4-2 for prepreg materials.
manufacturer’s brand type for which qualification is
sought. The number of samples required per lot sampled Table 4-1 Quality Conformance Plan for Monthly,
Quarterly and Annual Tests – Laminate
shall also be as specified in Table 3-1 or Table 3-2. The
number of specimens required for the individual test meth- Total Number of Laminated
Sheets Produced During Each Sample Acceptance
ods shall be cut from the sheets and inspected as specified. Sampling Period Size Number
≤200 1 0
4.3.2 Frequency Each material (as outlined in the speci-
201 to 1000 inclusive 2 0
fication sheets) shall undergo qualification once. The sup-
1,001 to 10,000 inclusive 3 0
plier, upon demand, shall provide sufficient data, as deter-
≥10,001 4 0
mined by the Manufacturer’s Quality System, that the
supplied material is qualified to this specification. A record Table 4-2 Quality Conformance Plan for Monthly,
of those materials qualified to this specification shall be Quarterly and Annual Tests – Prepreg
listed in the self declaration form provided by the supplier Total Linear Dimension of
in IPC-1730. Prepreg Produced During Each Sample Acceptance
Sampling Period (m) [yd] Size Number

4.3.3 Laminator Qualification Profile The manufacturer ≤730 [798.3] 1 0

shall verify on a periodic basis (every two years, mini- 731 [799.4] to 10,000 [10936.1] 2 0
mum) that the information contained in IPC-1730 accu- ≥10,001 [10937.2] 3 0
rately reflects overall capability.
4.4.2 Acceptance Criteria The acceptance number for
4.3.4 Changes in Composition Any changes to the all tests conducted on a lot, monthly, quarterly and annual
chemical composition must be evaluated by the supplier as basis will be zero (0). No failure shall be allowed for any
to the effect on performance properties or processing char- specimen tested.

18
December 2001 IPC-4101A

4.4.3 Rejected Lots If an inspection lot is rejected, the A product with 15 characteristics may meet specifications
supplier may rework it to correct the defects or screen out by quality conformance evaluations on two characteristics,
the defective units and resubmit for reinspection. Resub- in-process product evaluations on five characteristics, and
mitted lots shall be inspected using tightened inspection. process parameter control for five characteristics. The
Such lots shall be separate from new lots and shall be remaining three characteristics may meet specification by a
clearly identified as reinspected lots while the material is combination of in-process control and quality conformance
within the manufacturer’s facility. If the defect cannot be evaluations. Evidence of compliance to the specification at
screened out, the supplier shall sample additional lots and the level of SPC implementation claimed is auditable by
make processing corrections as necessary. If the additional the customer or an appointed third party.
lots inspected show the same defect, it shall be the suppli-
Requirements are dynamic in nature and are based on what
er’s responsibility to contact the user(s) regarding the prob-
is accepted in the worldwide market. Requirements may be
lem.
stated as a reduction of variation around a target value, as
4.4.4 Conformance Data Retention Quality conform- opposed to just meeting the specification, drawing, etc.
ance data shall be maintained for a minimum of three years
from the date of test. 5 PREPARATION FOR DELIVERY

4.4.5 Certificate of Conformance The certificate of con- 5.1 Packaging Materials Laminate and prepreg base
formance shall contain the following items as a minimum: materials shall be packed in a manner that will afford
• The name and address of the supplier. adequate protection against corrosion, deterioration, and
physical damage during shipment and storage.
• The designation code from the classification (see 1.1).
• The supplier’s grade designation.
5.2 Authorized Distributors The laminate and prepreg
• The lot(s) code for the material to be certified. base material manufacturer may authorize distributors to
• The statement, ‘‘This material has been manufactured, act as sales and/or fabrication and inspection agents. The
tested, and certified in accordance with the provisions of manufacturer shall be responsible for assuring materials
this document and the applicable slash sheet. For processed by authorized agents meet the applicable require-
example, IPC-4101/21.’’ ments of this specification. Authorized distributors shall be
• The original signature or line of authority of a designated responsible for the requirements of 3.8.3, 4.2, 4.2.1, 5.1,
company representative. and 6.1 as applicable and as determined by the manufactur-
er’s level of authorization. The type and frequency of
4.5 Statistical Process Control (SPC) SPC utilizes sys- audits shall be as determined by the manufacturer’s quality
tematic statistical techniques to analyze a process or its system.
outputs. The purposes of these analyses are to take appro-
priate actions to achieve and improve process capability. 6 NOTES
The primary goal of SPC is to continually reduce variations
in processes, products, or services in order to provide prod- 6.1 Ordering Information
uct meeting or exceeding real or important customer
requirements. 6.1.1 Ordering Data for Laminate Materials Purchase
Implementation of SPC shall be in accordance with IPC- orders should specify the following:
9191. Depending on the progress made in implementing A. Title, number, and revision letter of this specification
SPC on a particular product, an individual supplier may B. Specification sheet number and revision level
demonstrate compliance to specification with any of the
C. Specific exemptions to the specifications, if any
following:
D. Title, number, and date of any applicable drawing
Quality conformance evaluations
E. Information for preparation of delivery, if applicable
End-product control (see Section 5)
In-process product control F. Part classification (see 1.1), identification, and marking
instructions
Process parameter control
G. Production inspection, if applicable (see 4.4)
An individual supplier may choose to use a combination of H. Nominal thickness, width, and length of material (see
the four assurance techniques listed above to prove compli- 3.8.4)
ance.
I. The range of tolerance around the nominal dimensional
Example: stability (see 3.9.1.2)

19
IPC-4101A December 2001

J. All exceptions as agreed upon between user and sup- H. Nominal thickness, width, and length of material (see
plier 3.8.4)
K. Description of any test method not found in IPC-TM- I. Class, grade or range of property requirements, if appli-
650 or deviations from specified test methods cable
L. Request for certification, if applicable J. Resin content parameter and nominal value (see 1.1.7)
M. Request for a test data report and desired test methods, K. Resin flow parameter and nominal value (see 1.1.7)
if applicable L. Other prepreg parameters if applicable (see 1.1.7)
M. Description of any test method not found in IPC-TM-
6.1.2 Ordering Data for Prepreg Materials Purchase 650 or deviations from specified test methods
orders should specify the following:
N. Request for certification, if applicable
A. Title, number, and revision letter of the specification
O. Request for a test data report and desired test methods,
B. Specification sheet number and revision level if applicable
C. All exceptions as agreed upon between user and sup-
plier 6.2 New Materials Users and material developers are
D. Title, number, and date of any applicable drawing encouraged to supply information on new materials for
review by the IPC Laminate/Prepreg Materials Subcommit-
E. Information for preparation of delivery, if applicable
tee (3-11). Users who wish to invoke this specification for
(see Section 5)
metal-clad materials not listed shall list a L+zero (L0) for
F. Part Classification (see 1.1), identification, and marking the specification sheet number for laminate materials and a
instructions P+zero (P0) for the specification sheet number for prepreg
G. Production inspection, if applicable (see 4.4) materials.

20
December 2001 IPC-4101A

Specification Sheets for Laminates and Prepregs

SPECIFICATION SHEET #: IPC-4101/00

REINFORCEMENT: 1: Cellulose paper 2: None
RESIN SYSTEM: Primary: Phenolic
Secondary 1: None Secondary 2: None
FLAME RETARDANT MECHANISM: N/A UL94 Requirement: HB
FILLERS: None
ID REFERENCE: UL/ANSI: XPC MIL-S-13949: N/A
ANSI: XPC/00
GLASS TRANSITION (Tg): N/A

SPECIFICATION SHEET #: IPC-4101/01

REINFORCEMENT: 1: Cellulose paper 2: None
RESIN SYSTEM: Primary: Phenolic
Secondary 1: None Secondary 2: None
FLAME RETARDANT MECHANISM: N/A UL94 Requirement: HB
FILLERS: None
ID REFERENCE: UL/ANSI: XXXPC MIL-S-13949: N/A
ANSI: XXXPC/01
GLASS TRANSITION (Tg): N/A

SPECIFICATION SHEET #: IPC-4101/02

REINFORCEMENT: 1: Cellulose paper 2: None
RESIN SYSTEM: Primary: Phenolic
Secondary 1: None Secondary 2: None
FLAME RETARDANT MECHANISM: Bromine/Chlorine Minimum UL94 Requirement: V-1
FILLERS: None
ID REFERENCE: UL/ANSI: FR-1 MIL-S-13949: N/A
ANSI: FR-1/02
GLASS TRANSITION (Tg): N/A

SPECIFICATION SHEET #: IPC-4101/03

REINFORCEMENT: 1: Cellulose paper 2: None
RESIN SYSTEM: Primary: Phenolic
Secondary 1: None Secondary 2: None
FLAME RETARDANT MECHANISM: Bromine/Chlorine Minimum UL94 Requirement: V-1
FILLERS: None
ID REFERENCE: UL/ANSI: FR-2 MIL-S-13949: N/A
ANSI: FR-2/03
GLASS TRANSITION (Tg): N/A

SPECIFICATION SHEET #: IPC-4101/04

REINFORCEMENT: 1: Cellulose paper 2: None
RESIN SYSTEM: Primary: Epoxy
Secondary 1: None Secondary 2: None
FLAME RETARDANT MECHANISM: Bromine/Chlorine/Antimony oxide Minimum UL94 Requirement: V-1
FILLERS: None
ID REFERENCE: UL/ANSI: FR-3 MIL-S-13949: N/A
ANSI: FR-3/04
GLASS TRANSITION (Tg): N/A

SPECIFICATION SHEET #: IPC-4101/10

REINFORCEMENT: 1: Woven E-glass, surface 2: Cellulose paper, core
RESIN SYSTEM: Primary: Epoxy
Secondary 1: Phenolic Secondary 2: N/A
FLAME RETARDANT MECHANISM: Bromine/Antimony oxide UL94 Requirement: V-0
FILLERS: N/A
ID REFERENCE: UL/ANSI: CEM-1 MIL-S-13949: N/A
ANSI: CEM-1/10
GLASS TRANSITION (Tg): 100°C minimum

21
IPC-4101A December 2001

SPECIFICATION SHEET #: IPC-4101/11

REINFORCEMENT: 1: Woven E-glass, surface 2: Nonwoven E-glass core
RESIN SYSTEM: Primary: Polyester
Secondary 1: Vinyl ester Secondary 2: N/A
FLAME RETARDANT MECHANISM: Bromine
FILLERS: Inorganic fillers
ID REFERENCE: UL/ANSI: N/A MIL-S-13949: N/A
ANSI: CRM-5/11
GLASS TRANSITION (Tg): N/A

SPECIFICATION SHEET #: IPC-4101/12

REINFORCEMENT: 1: Woven E-glass, surface 2: Nonwoven E-glass core
RESIN SYSTEM: Primary: Epoxy
Secondary 1: N/A Secondary 2: N/A
FLAME RETARDANT MECHANISM: Bromine UL94 Requirement: V-0
FILLERS: With or without inorganic fillers
ID REFERENCE: UL/ANSI: CEM-3 MIL-S-13949: N/A
ANSI: CEM-3/12
GLASS TRANSITION (Tg): N/A

SPECIFICATION SHEET #: IPC-4101/13

REINFORCEMENT: 1: Woven E-glass 2: N/A
RESIN SYSTEM: Primary: Polyester
Secondary 1: Vinyl ester Secondary 2: N/A
FLAME RETARDANT MECHANISM: Bromine
FILLERS: Inorganic fillers
ID REFERENCE: UL/ANSI: N/A MIL-S-13949: N/A
ANSI: 4101/13
GLASS TRANSITION (Tg): N/A

SPECIFICATION SHEET #: IPC-4101/20

REINFORCEMENT: 1: Woven E-glass 2: N/A
RESIN SYSTEM: Primary: Epoxy
Secondary 1: N/A Secondary 2: N/A
FLAME RETARDANT MECHANISM: N/A UL94 Requirement: HB
FILLERS: N/A
ID REFERENCE: UL/ANSI: G-10 MIL-S-13949: /03 - GE, GEN
ANSI: G-10/20
GLASS TRANSITION (Tg): N/A

SPECIFICATION SHEET #: IPC-4101/21

REINFORCEMENT: 1: Woven E-glass 2: N/A
RESIN SYSTEM: Primary: Difunctional epoxy
Secondary 1: Multifunctional epoxy Secondary 2: N/A
FLAME RETARDANT MECHANISM: Bromine Minimum UL94 Requirement: V-1
FILLERS: N/A
ID REFERENCE: UL/ANSI: FR-4 MIL-S-13949: /04 - GF, GFN, GFK, GFP, GFM
ANSI: FR-4/21
GLASS TRANSITION (Tg): 110°C to 150°C

SPECIFICATION SHEET #: IPC-4101/22

REINFORCEMENT: 1: Woven E-glass 2: N/A
RESIN SYSTEM: Primary: Epoxy, hot strength retention
Secondary 1: N/A Secondary 2: N/A
FLAME RETARDANT MECHANISM: N/A UL94 Requirement: HB
FILLERS: N/A
ID REFERENCE: UL/ANSI: G-11 MIL-S-13949: /02 - GB, GBN, GBP
ANSI: G-11/22
GLASS TRANSITION (Tg): 135°C - 175°C

22
December 2001 IPC-4101A

SPECIFICATION SHEET #: IPC-4101/23

REINFORCEMENT: 1: Woven E-glass 2: N/A
RESIN SYSTEM: Primary: Epoxy, hot strength retention
Secondary 1: N/A Secondary 2: N/A
FLAME RETARDANT MECHANISM: Bromine Minimum UL94 Requirement: V-1
FILLERS: N/A
ID REFERENCE: UL/ANSI: FR-5 MIL-S-13949: /05 - GH, GHN, GHP
ANSI: FR-5/23
GLASS TRANSITION (Tg): 135°C - 185°C

SPECIFICATION SHEET #: IPC-4101/24

REINFORCEMENT: 1: Woven E-glass 2: N/A
RESIN SYSTEM: Primary: Epoxy
Secondary 1: Multifunctional epoxy Secondary 2: N/A
FLAME RETARDANT MECHANISM: Bromine Minimum UL94 Requirement: V-1
FILLERS: N/A
ID REFERENCE: UL/ANSI: FR-4 MIL-S-13949: /04 - GF, GFG, GFN
ANSI: FR-4/24
GLASS TRANSITION (Tg): 150°C - 200°C

SPECIFICATION SHEET #: IPC-4101/25

REINFORCEMENT: 1: Woven E-glass 2: N/A
RESIN SYSTEM: Primary: Epoxy
Secondary 1: Polyphenylene oxide Secondary 2: N/A
FLAME RETARDANT MECHANISM: Bromine
FILLERS: N/A
ID REFERENCE: UL/ANSI: N/A MIL-S-13949: /04 - GF, GFG, GFN
ANSI: 4101/25
GLASS TRANSITION (Tg): 150°C - 200°C

SPECIFICATION SHEET #: IPC-4101/26

REINFORCEMENT: 1: Woven E-glass 2: N/A
RESIN SYSTEM: Primary: Epoxy
Secondary 1: Multifunctional epoxy Secondary 2: N/A
FLAME RETARDANT MECHANISM: Bromine Minimum UL94 Requirement: V-1
FILLERS: N/A
ID REFERENCE: UL/ANSI: FR-4 MIL-S-13949: /04 - GF, GFT
ANSI: FR-4/26
GLASS TRANSITION (Tg): 170°C - 220°C

SPECIFICATION SHEET #: IPC-4101/27

REINFORCEMENT: 1: Unidirectional E-glass, cross plied 2: N/A
RESIN SYSTEM: Primary: Epoxy
Secondary 1: Multifunctional epoxy Secondary 2: N/A
FLAME RETARDANT MECHANISM: Bromine
FILLERS: N/A
ID REFERENCE: UL/ANSI: N/A MIL-S-13949: N/A
ANSI: 4101/27
GLASS TRANSITION (Tg): 110°C minimum

SPECIFICATION SHEET #: IPC-4101/28

REINFORCEMENT: 1: Woven E-glass 2: N/A
RESIN SYSTEM: Primary: Epoxy
Secondary 1: (Non-epoxy) Secondary 2: (Non-epoxy)
FLAME RETARDANT MECHANISM: Bromine
FILLERS: N/A
ID REFERENCE: UL/ANSI: N/A MIL-S-13949: /04 - GFN, GFT
ANSI: 4101/28
GLASS TRANSITION (Tg): 170°C - 220°C

23
IPC-4101A December 2001

SPECIFICATION SHEET #: IPC-4101/29

REINFORCEMENT: 1: Woven E-glass 2: N/A
RESIN SYSTEM: Primary: Epoxy
Secondary 1: Triazine Secondary 2: N/A
FLAME RETARDANT MECHANISM: Bromine
FILLERS: N/A
ID REFERENCE: UL/ANSI: N/A MIL-S-13949: /04 - GFN, GFT
ANSI: 4101/29
GLASS TRANSITION (Tg): 170°C - 220°C

SPECIFICATION SHEET #: IPC-4101/30

REINFORCEMENT: 1: Woven E-glass 2: N/A
RESIN SYSTEM: Primary: Bismaleimide/Triazine (BT)
Secondary 1: Epoxy Secondary 2: N/A
FLAME RETARDANT MECHANISM: Bromine Minimum UL94 Requirement: HB
FILLERS: N/A
ID REFERENCE: UL/ANSI: GPY MIL-S-13949: /26 - GIT
ANSI: GPY/30
GLASS TRANSITION (Tg): 170°C - 220°C

SPECIFICATION SHEET #: IPC-4101/40

REINFORCEMENT: 1: Woven E-glass 2: N/A
RESIN SYSTEM: Primary: Polyimide
Secondary 1: N/A Secondary 2: N/A
FLAME RETARDANT MECHANISM: N/A Minimum UL94 Requirement: HB
FILLERS: With or without inorganic fillers
ID REFERENCE: UL/ANSI: GPY MIL-S-13949: /10 - GI, GIN, GIJ, GIP, GIL
ANSI: GPY/40
GLASS TRANSITION (Tg): 200°C minimum

SPECIFICATION SHEET #: IPC-4101/41

REINFORCEMENT: 1: Woven E-glass 2: N/A
RESIN SYSTEM: Primary: Polyimide
Secondary 1: N/A Secondary 2: N/A
FLAME RETARDANT MECHANISM: N/A Minimum UL94 Requirement: HB
FILLERS: With or without inorganic fillers
ID REFERENCE: UL/ANSI: GPY MIL-S-13949: /10 - GIL, GIP
ANSI: GPY/41
GLASS TRANSITION (Tg): 250°C minimum

SPECIFICATION SHEET #: IPC-4101/42

REINFORCEMENT: 1: Woven E-glass 2: None
RESIN SYSTEM: Primary: Polyimide
Secondary 1: Epoxy Secondary 2: None
FLAME RETARDANT MECHANISM: N/A Minimum UL94 Requirement: HB
FILLERS: With or without inorganic fillers
ID REFERENCE: UL/ANSI: GPY MIL-S-13949: /10 - GIJ
ANSI: GPY/42
GLASS TRANSITION (Tg): 200°C - 250°C

SPECIFICATION SHEET #: IPC-4101/50

REINFORCEMENT: 1: Woven aramid 2: None
RESIN SYSTEM: Primary: Epoxy
Secondary 1: Multifunctional epoxy Secondary 2: None
FLAME RETARDANT MECHANISM: Bromine
FILLERS: None
ID REFERENCE: UL/ANSI: N/A MIL-S-13949: /15 - AF, AFN, AFG
ANSI: 4101/50
GLASS TRANSITION (Tg): 150°C - 200°C

24
December 2001 IPC-4101A

SPECIFICATION SHEET #: IPC-4101/53

REINFORCEMENT: 1: Nonwoven aramid paper 2: N/A
RESIN SYSTEM: Primary: Polyimide
Secondary 1: Epoxy Secondary 2: N/A
FLAME RETARDANT MECHANISM: N/A
FILLERS: N/A
ID REFERENCE: UL/ANSI: N/A MIL-S-13949: /31 - BIN, BIL, BIJ
ANSI: 4101/53
GLASS TRANSITION (Tg): 220°C minimum

SPECIFICATION SHEET #: IPC-4101/54

REINFORCEMENT: 1: Unidirectional aramid fiber, cross-plied 2: None
RESIN SYSTEM: Primary: Cyanate ester
Secondary 1: None Secondary 2: None
FLAME RETARDANT MECHANISM: Bromine
FILLERS: None
ID REFERENCE: UL/ANSI: N/A MIL-S-13949: N/A
ANSI: 4101/54
GLASS TRANSITION (Tg): 230°C

SPECIFICATION SHEET #: IPC-4101/55

REINFORCEMENT: 1: Nonwoven aramid paper 2: None
RESIN SYSTEM: Primary: Epoxy
Secondary 1: Multifunctional epoxy Secondary 2: None
FLAME RETARDANT MECHANISM: Bromine
FILLERS: None
ID REFERENCE: UL/ANSI: N/A MIL-S-13949: /22 - BF, BFN, BFG
ANSI: 4101/55
GLASS TRANSITION (Tg): 150°C to 200°C

SPECIFICATION SHEET #: IPC-4101/56

REINFORCEMENT: 1: Nonwoven aramid paper 2: N/A
RESIN SYSTEM: Primary: Polyimide
Secondary 1: N/A Secondary 2: N/A
FLAME RETARDANT MECHANISM: N/A
FILLERS: N/A
ID REFERENCE: UL/ANSI: N/A MIL-S-13949: /31 - BIL
ANSI: 4101/56
GLASS TRANSITION (Tg): 250°C minimum

SPECIFICATION SHEET #: IPC-4101/60

REINFORCEMENT: 1: Woven quartz fiber 2: N/A
RESIN SYSTEM: Primary: Polyimide
Secondary 1: N/A Secondary 2: N/A
FLAME RETARDANT MECHANISM: Bromine (if applicable)
FILLERS: N/A
ID REFERENCE: UL/ANSI: N/A MIL-S-13949: /19 - QIL
ANSI: 4101/60
GLASS TRANSITION (Tg): 250°C minimum

SPECIFICATION SHEET #: IPC-4101/70

REINFORCEMENT: 1: Woven S-2 glass 2: N/A
RESIN SYSTEM: Primary: Cyanate ester
Secondary 1: N/A Secondary 2: N/A
FLAME RETARDANT MECHANISM: Bromine
FILLERS: N/A
ID REFERENCE: UL/ANSI: N/A MIL-S-13949: N/A
ANSI: 4101/70
GLASS TRANSITION (Tg): 230°C minimum

25
IPC-4101A December 2001

SPECIFICATION SHEET #: IPC-4101/71

REINFORCEMENT: 1: Woven E-glass 2: N/A
RESIN SYSTEM: Primary: Cyanate ester
Secondary 1: N/A Secondary 2: N/A
FLAME RETARDANT MECHANISM: Bromine
FILLERS: N/A
ID REFERENCE: UL/ANSI: N/A MIL-S-13949: /29 - GCN
ANSI: 4101/71
GLASS TRANSITION (Tg): 230°C minimum

SPECIFICATION SHEET #: IPC-4101/80

REINFORCEMENT: 1: Woven E-glass, surface 2: Cellulose paper, core
RESIN SYSTEM: Primary: Epoxy
Secondary 1: Phenolic Secondary 2: N/A
FLAME RETARDANT MECHANISM: Bromine/Antimony oxide UL94 Requirement: V-0
FILLERS: Kaolin and/or inorganic catalyst
ID REFERENCE: UL/ANSI: CEM-1 MIL-S-13949: N/A
ANSI: CEM-1/80
GLASS TRANSITION (Tg): 100°C minimum

SPECIFICATION SHEET #: IPC-4101/81

REINFORCEMENT: 1: Woven E-glass, surface 2: Nonwoven E-glass (chopped felt), core
RESIN SYSTEM: Primary: Epoxy
Secondary 1: Multifunctional epoxy Secondary 2: N/A
FLAME RETARDANT MECHANISM: Bromine UL94 Requirement: V-0
FILLERS: Kaolin and/or inorganic catalyst
ID REFERENCE: UL/ANSI: CEM-3 MIL-S-13949: N/A
ANSI: CEM-3/81
GLASS TRANSITION (Tg): N/A

SPECIFICATION SHEET #: IPC-4101/82

REINFORCEMENT: 1: Woven E-glass 2: N/A
RESIN SYSTEM: Primary: Epoxy
Secondary 1: Multifunctional epoxy Secondary 2: N/A
FLAME RETARDANT MECHANISM: Bromine Minimum UL94 Requirement: V-1
FILLERS: Kaolin and/or inorganic catalyst
ID REFERENCE: UL/ANSI: FR-4 MIL-S-13949: N/A
ANSI: FR-4/82
GLASS TRANSITION (Tg): 110°C minimum

SPECIFICATION SHEET #: IPC-4101/83

REINFORCEMENT: 1: Woven E-glass 2: N/A
RESIN SYSTEM: Primary: Epoxy
Secondary 1: Multifunctional epoxy Secondary 2: N/A
FLAME RETARDANT MECHANISM: Bromine Minimum UL94 Requirement: V-1
FILLERS: Kaolin and/or inorganic catalyst
ID REFERENCE: UL/ANSI: FR-4 MIL-S-13949: N/A
ANSI: FR-4/83
GLASS TRANSITION (Tg): 150°C - 200°C

SPECIFICATION SHEET #: IPC-4101/90

REINFORCEMENT: 1: Woven E-glass, surface 2: N/A
RESIN SYSTEM: Primary: Polyphenylene ether
Secondary 1: N/A Secondary 2: N/A
FLAME RETARDANT MECHANISM: Bromine/Antimony oxide
FILLERS: N/A
ID REFERENCE: UL/ANSI: N/A MIL-S-13949: N/A
ANSI: 4101/90
GLASS TRANSITION (Tg): 175°C minimum

26
December 2001 IPC-4101A

SPECIFICATION SHEET #: IPC-4101/91

REINFORCEMENT: 1: Woven E-glass 2: N/A
RESIN SYSTEM: Primary: Polyphenylene ether
Secondary 1: N/A Secondary 2: N/A
FLAME RETARDANT MECHANISM: Bromine
FILLERS: N/A
ID REFERENCE: UL/ANSI: N/A MIL-S-13949: N/A
ANSI: 4101/91
GLASS TRANSITION (Tg): 175°C minimum

SPECIFICATION SHEET #: IPC-4101/92

REINFORCEMENT: 1: Woven E-glass 2: N/A
RESIN SYSTEM: Primary: Epoxy
Secondary 1: Multifunctional epoxy Secondary 2: N/A
FLAME RETARDANT MECHANISM: Phosphorous Minimum UL94 Requirement: V-1
FILLERS: N/A
ID REFERENCE: UL/ANSI: FR-4 MIL-S-13949: N/A
ANSI: FR-4/92
GLASS TRANSITION (Tg): 110°C - 150°C

SPECIFICATION SHEET #: IPC-4101/93

REINFORCEMENT: 1: Woven E-glass 2: N/A
RESIN SYSTEM: Primary: Epoxy
Secondary 1: Multifunctional epoxy Secondary 2: N/A
FLAME RETARDANT MECHANISM: Aluminum hydroxide Minimum UL94 Requirement: V-1
FILLERS: N/A
ID REFERENCE: UL/ANSI: FR-4 MIL-S-13949: N/A
ANSI: FR-4/93
GLASS TRANSITION (Tg): 110°C - 150°C

SPECIFICATION SHEET #: IPC-4101/94

REINFORCEMENT: 1: Woven E-glass 2: N/A
RESIN SYSTEM: Primary: Epoxy
Secondary 1: Multifunctional epoxy Secondary 2: N/A
FLAME RETARDANT MECHANISM: Phosphorous Minimum UL94 Requirement: V-1
FILLERS: N/A
ID REFERENCE: UL/ANSI: FR-4 MIL-S-13949: N/A
ANSI: FR-4/94
GLASS TRANSITION (Tg): 150°C - 200°C

SPECIFICATION SHEET #: IPC-4101/95

REINFORCEMENT: 1: Woven E-glass 2: N/A
RESIN SYSTEM: Primary: Epoxy
Secondary 1: Multifunctional epoxy Secondary 2: N/A
FLAME RETARDANT MECHANISM: Aluminum hydroxide Minimum UL94 Requirement: V-1
FILLERS: N/A
ID REFERENCE: UL/ANSI: FR-4 MIL-S-13949: N/A
ANSI: FR-4/95
GLASS TRANSITION (Tg): 150°C - 200°C

SPECIFICATION SHEET #: IPC-4101/96

REINFORCEMENT: 1: Woven E-glass 2: N/A
RESIN SYSTEM: Primary: Polyphenylene ether
Secondary 1: N/A Secondary 2: N/A
FLAME RETARDANT MECHANISM: Non-Bromine/Non-Antimony
FILLERS: N/A
ID REFERENCE: UL/ANSI: N/A MIL-S-13949: N/A
ANSI: 4101/96
GLASS TRANSITION (Tg): 175°C minimum

27
IPC-4101A December 2001

SPECIFICATION SHEET #: IPC-4101/97

REINFORCEMENT: 1: Woven E-glass 2: N/A
RESIN SYSTEM: Primary: Difunctional epoxy
Secondary 1: Multifunctional epoxy Secondary 2: N/A
FLAME RETARDANT MECHANISM: Bromine Minimum UL94 Requirement: V-1
FILLERS: Inorganic fillers
ID REFERENCE: UL/ANSI: FR-4 MIL-S-13949: /4 - GF, GFN, GFK, GFP, GFM
ANSI: FR-4/97
GLASS TRANSITION (Tg): 110°C to 150°C

SPECIFICATION SHEET #: IPC-4101/98

REINFORCEMENT: 1: Woven E-glass 2: N/A
RESIN SYSTEM: Primary: Epoxy
Secondary 1: Multifunctional epoxy Secondary 2: N/A
FLAME RETARDANT MECHANISM: Bromine Minimum UL94 Requirement: V-1
FILLERS: Inorganic fillers
ID REFERENCE: UL/ANSI: FR-4 MIL-S-13949: /04 - GF, GFG, GFN
ANSI: FR-4/98
GLASS TRANSITION (Tg): 150°C - 200°C

28
December 2001 IPC-4101A

Revision Date: December 2001

SPECIFICATION SHEET
SPECIFICATION SHEET #: IPC-4101/00
REINFORCEMENT: 1: Cellulose paper 2: None
RESIN SYSTEM: Primary: Phenolic
Secondary 1: None Secondary 2: None
FLAME RETARDANT MECHANISM: N/A UL94 Requirement: HB
FILLERS: None
ID REFERENCE: UL/ANSI: XPC MIL-S-13949: N/A
ANSI: XPC/00
GLASS TRANSITION (Tg): N/A
LAMINATE REQUIREMENTS
Specification Specification
<0.50 mm ≥0.50 mm
Laminate Requirement [0.0197 in] [0.0197 in] Units Test Method Ref. Para.
1. Peel Strength, minimum 3.9.1.1
A. Low profile copper foil and very low profile
copper foil – all copper foil >17µm [0.669 mil]. – AABUS
2.4.8
B. Standard profile copper foil
N/mm [lb/in] 2.4.8.2
1. After thermal stress – 1.05 [6.00] 3.9.1.1.1
2.4.8.3
2. At 105°C [221°F] – – 3.9.1.1.2
3. After process solutions – – 3.9.1.1.3
C. All other foil – composite – AABUS
2. Volume Resistivity, minimum
A. After humidity conditioning – 104 MΩ–cm 2.5.17.1 3.11.1.3
B. At elevated temperature – –
3. Surface Resistivity, minimum
A. After humidity conditioning – 103 MΩ 2.5.17.1 3.11.1.4
B. At elevated temperature – –
4. Moisture Absorption, maximum – 1.3 % 2.6.2.1 3.12.1.1
5. Dielectric Breakdown, minimum – 15 kV 2.5.6 3.11.1.6
6. Permittivity at 1 MHz, maximum 2.5.5.2
3.11.1.1
(Laminate & prepreg as laminated) – 5.6 – 2.5.5.3
3.11.2.1
2.5.5.9
7. Loss Tangent at 1 MHz, maximum 2.5.5.2
3.11.1.2
(Laminate & prepreg as laminated) – 0.07 – 2.5.5.3
3.11.2.2
2.5.5.9
8. Flexural Strength, minimum
A. Length direction – 82 [11,890] N/mm2 [lb/in2] 2.4.4 3.9.1.3
B. Cross direction – 72 [10,440]
9. Flexural Strength at Elevated Temperature,
– – N/mm2 [lb/in2] 2.4.4.1 3.9.1.4
length direction, minimum
10. Arc Resistance, minimum – – s 2.5.1 3.11.1.5
11. Thermal Stress 10 s at 260°C [500°F], minimum
– Pass Visual rating 2.4.13.1 3.10.1.2
Note: Use peel specimen.
12. Electric Strength, minimum 3.11.1.7
– – kV/mm 2.5.6.2
(Laminate & prepreg as laminated) 3.11.2.3
13. Flammability 3.10.2.1
– HB rating UL94
(Laminate & prepreg as laminated) 3.10.1.1
14. Other – –
PREPREG REQUIREMENTS
Prepreg Requirement Specification Units Test Method Ref. Para.
1. Shelf Life, minimum (Condition 1/Condition 2) – Days AABUS 3.17
2. Reinforcement As per IPC-4110 or AABUS.
3. Volatile content maximum – % 2.3.19 3.9.2.2.8
4. Prepreg Parameters – AABUS AABUS 1.1.7
5. Other –
6. Other –
*AABUS = As agreed upon between user and supplier.

29
IPC-4101A December 2001

Revision Date: December 2001

SPECIFICATION SHEET
SPECIFICATION SHEET #: IPC-4101/01
REINFORCEMENT: 1: Cellulose paper 2: None
RESIN SYSTEM: Primary: Phenolic
Secondary 1: None Secondary 2: None
FLAME RETARDANT MECHANISM: N/A UL94 Requirement: HB
FILLERS: None
ID REFERENCE: UL/ANSI: XXXPC MIL-S-13949: N/A
ANSI: XXXPC/01
GLASS TRANSITION (Tg): N/A
LAMINATE REQUIREMENTS
Specification Specification
<0.50 mm ≥0.50 mm
Laminate Requirement [0.0197 in] [0.0197 in] Units Test Method Ref. Para.
1. Peel Strength, minimum 3.9.1.1
A. Low profile copper foil and very lowprofile
copper foil – all copper foil >17µm [0.669 mil]. – –
2.4.8
B. Standard profile copper foil
N/mm [lb/in] 2.4.8.2
1. After thermal stress – 1.05 [6.00] 3.9.1.1.1
2.4.8.3
2. At 105°C [221°F] – – 3.9.1.1.2
3. After process solutions – – 3.9.1.1.3
C. All other foil – composite – –
2. Volume Resistivity, minimum
A. C-96/35/90 – 104
MΩ–cm 2.5.17.1 3.11.1.3
B. After moisture resistance – –
C. At elevated temperature E-24/125 – –
3. Surface Resistivity, minimum
A. C-96/35/90 – 103
MΩ 2.5.17.1 3.11.1.4
B. After moisture resistance – –
C. At elevated temperature E-24/125 – –
4. Moisture Absorption, maximum – 1.3 % 2.6.2.1 3.12.1.1
5. Dielectric Breakdown, minimum – 15 kV 2.5.6 3.11.1.6
6. Permittivity at 1 MHz, maximum 2.5.5.2
3.11.1.1
(Laminate & prepreg as laminated) – 4.8 – 2.5.5.3
3.11.2.1
2.5.5.9
7. Loss Tangent at 1 MHz, maximum 2.5.5.2
3.11.1.2
(Laminate & prepreg as laminated) – 0.04 – 2.5.5.3
3.11.2.2
2.5.5.9
8. Flexural Strength, minimum
A. Length direction – 83 [12,040] N/mm2 [lb/in2] 2.4.4 3.9.1.3
B. Cross direction – 72 [10,440]
9. Flexural Strength at Elevated Temperature,
– – N/mm2 [lb/in2] 2.4.4.1 3.9.1.4
length direction, minimum
10. Arc Resistance, minimum – – s 2.5.1 3.11.1.5
11. Thermal Stress 10 s at 260°C [500°F], minimum
– Pass Visual rating 2.4.13.1 3.10.1.2
Note: Use peel specimen.
12. Electric Strength, minimum 3.11.1.7
– – kV/mm 2.5.6.2
(Laminate & prepreg as laminated) 3.11.2.3
13. Flammability 3.10.2.1
– HB rating UL94
(Laminate & prepreg as laminated) 3.10.1.1
14. Other – –
PREPREG REQUIREMENTS
Prepreg Requirement Specification Units Test Method Ref. Para.
1. Shelf Life, minimum (Condition 1/Condition 2) – Days AABUS 3.17
2. Reinforcement As per IPC-4110 or AABUS.
3. Volatile content maximum – % 2.3.19 3.9.2.2.8
4. Prepreg Parameters – AABUS AABUS 1.1.7
5. Other –
6. Other –
*AABUS = As agreed upon between user and supplier.

30
December 2001 IPC-4101A

Revision Date: December 2001

SPECIFICATION SHEET
SPECIFICATION SHEET #: IPC-4101/02
REINFORCEMENT: 1: Cellulose paper 2: None
RESIN SYSTEM: Primary: Phenolic
Secondary 1: None Secondary 2: None
FLAME RETARDANT MECHANISM: Bromine/Chlorine Minimum UL94 Requirement: V-1
FILLERS: None
ID REFERENCE: UL/ANSI: FR-1 MIL-S-13949: N/A
ANSI: FR-1/02
GLASS TRANSITION (Tg): N/A
LAMINATE REQUIREMENTS
Specification Specification
<0.50 mm ≥0.50 mm
Laminate Requirement [0.0197 in] [0.0197 in] Units Test Method Ref. Para.
1. Peel Strength, minimum 3.9.1.1
A. Low profile copper foil and very low profile
copper foil – all copper foil >17µm [0.669 mil]. – –
2.4.8
B. Standard profile copper foil
N/mm [lb/in] 2.4.8.2
1. After thermal stress – 1.05 [6.00] 3.9.1.1.1
2.4.8.3
2. At 105°C [221°F] – – 3.9.1.1.2
3. After process solutions – – 3.9.1.1.3
C. All other foil – composite – –
2. Volume Resistivity, minimum
A. C-96/35/90 – 103
MΩ–cm 2.5.17.1 3.11.1.3
B. After moisture resistance – –
C. At elevated temperature E-24/125 – –
3. Surface Resistivity, minimum
A. C-96/35/90 – 102
MΩ 2.5.17.1 3.11.1.4
B. After moisture resistance – –
C. At elevated temperature E-24/125 – –
4. Moisture Absorption, maximum – 5.6 % 2.6.2.1 3.12.1.1
5. Dielectric Breakdown, minimum – 5.0 kV 2.5.6 3.11.1.6
6. Permittivity at 1 MHz, maximum 2.5.5.2
3.11.1.1
(Laminate & prepreg as laminated) – 6.0 – 2.5.5.3
3.11.2.1
2.5.5.9
7. Loss Tangent at 1 MHz, maximum 2.5.5.2
3.11.1.2
(Laminate & prepreg as laminated) – 0.06 – 2.5.5.3
3.11.2.2
2.5.5.9
8. Flexural Strength, minimum
A. Length direction – 82 [11,890] N/mm2 [lb/in2] 2.4.4 3.9.1.3
B. Cross direction – 69 [10,010]
9. Flexural Strength at Elevated Temperature,
– – N/mm2 [lb/in2] 2.4.4.1 3.9.1.4
length direction, minimum
10. Arc Resistance, minimum – 20 s 2.5.1 3.11.1.5
11. Thermal Stress 10 s 260°C [500°F], minimum
– Pass Visual rating 2.4.13.1 3.10.1.2
Note: Use peel specimen.
12. Electric Strength, minimum 3.11.1.7
– – kV/mm 2.5.6.2
(Laminate & prepreg as laminated) 3.11.2.3
13. Flammability 3.10.2.1
– V-1 minimum rating UL94
(Laminate & prepreg as laminated) 3.10.1.1
14. Other – –
PREPREG REQUIREMENTS
Prepreg Requirement Specification Units Test Method Ref. Para.
1. Shelf Life, minimum (Condition 1/Condition 2) – Days AABUS 3.17
2. Reinforcement As per IPC-4110 or AABUS.
3. Volatile content maximum – % 2.3.19 3.9.2.2.8
4. Prepreg Parameters – AABUS AABUS 1.1.7
5. Other –
6. Other –
*AABUS = As agreed upon between user and supplier.

31
IPC-4101A December 2001

Revision Date: December 2001

SPECIFICATION SHEET
SPECIFICATION SHEET #: IPC-4101/03
REINFORCEMENT: 1: Cellulose paper 2: None
RESIN SYSTEM: Primary: Phenolic
Secondary 1: None Secondary 2: None
FLAME RETARDANT MECHANISM: Bromine/Chlorine Minimum UL94 Requirement: V-1
FILLERS: None
ID REFERENCE: UL/ANSI: FR-2 MIL-S-13949: N/A
ANSI: FR-2/03
GLASS TRANSITION (Tg): N/A
LAMINATE REQUIREMENTS
Specification Specification
<0.50 mm ≥0.50 mm
Laminate Requirement [0.0197 in] [0.0197 in] Units Test Method Ref. Para.
1. Peel Strength, minimum 3.9.1.1
A. Low profile copper foil and very low profile
copper foil – all copper foil >17µm [0.669 mil]. – –
B. Standard profile copper foil
N/mm [lb/in] 2.4.8
1. After thermal stress – 1.05 [6.00] 3.9.1.1.1
2. At 105°C [221°F] – – 3.9.1.1.2
3. After process solutions – – 3.9.1.1.3
C. All other foil – composite – –
2. Volume Resistivity, minimum
A. C-96/35/90 – 103
MΩ–cm 2.5.17.1 3.11.1.3
B. After moisture resistance – –
C. At elevated temperature E-24/125 – –
3. Surface Resistivity, minimum
A. C-96/35/90 – 103
MΩ 2.5.17.1 3.11.1.4
B. After moisture resistance – –
C. At elevated temperature E-24/125 – –
4. Moisture Absorption, maximum – 1.3 % 2.6.2.1 3.12.1.1
5. Dielectric Breakdown, minimum – 15 kV 2.5.6 3.11.1.6
6. Permittivity at 1 MHz, maximum 2.5.5.2
3.11.1.1
(Laminate & prepreg as laminated) – 5.0 – 2.5.5.3
3.11.2.1
2.5.5.9
7. Loss Tangent at 1 MHz, maximum 2.5.5.2
3.11.1.2
(Laminate & prepreg as laminated) – 0.045 – 2.5.5.3
3.11.2.2
2.5.5.9
8. Flexural Strength, minimum
A. Length direction – 83 [12,040] N/mm2 [lb/in2] 2.4.4 3.9.1.3
B. Cross direction – 72 [10,440]
9. Flexural Strength at Elevated Temperature,
– – N/mm2 [lb/in2] 2.4.4.1 3.9.1.4
length direction, minimum
10. Arc Resistance, minimum – 20 s 2.5.1 3.11.1.5
11. Thermal Stress 10 s 260°C [500°F], minimum
– Pass Visual rating 2.4.13.1 3.10.1.2
Note: Use peel specimen.
12. Electric Strength, minimum 3.11.1.7
– – kV/mm 2.5.6.2
(Laminate & prepreg as laminated) 3.11.2.3
13. Flammability 3.10.2.1
– V-1 minimum rating UL94
(Laminate & prepreg as laminated) 3.10.1.1
14. Other – –
PREPREG REQUIREMENTS
Prepreg Requirement Specification Units Test Method Ref. Para.
1. Shelf Life, minimum (Condition 1/Condition 2) – Days AABUS 3.17
2. Reinforcement As per IPC-4110 or AABUS.
3. Volatile content maximum – % 2.3.19 3.9.2.2.8
4. Prepreg Parameters – AABUS AABUS 1.1.7
5. Other –
6. Other –
*AABUS = As agreed upon between user and supplier.

32
December 2001 IPC-4101A

Revision Date: December 2001

SPECIFICATION SHEET
SPECIFICATION SHEET #: IPC-4101/04
REINFORCEMENT: 1: Cellulose paper 2: None
RESIN SYSTEM: Primary: Epoxy
Secondary 1: None Secondary 2: None
FLAME RETARDANT MECHANISM: Bromine/Chlorine/Antimony oxide Minimum UL94 Requirement: V-1
FILLERS: None
ID REFERENCE: UL/ANSI: FR-3 MIL-S-13949: N/A
ANSI: FR-3/04
GLASS TRANSITION (Tg): N/A
LAMINATE REQUIREMENTS
Specification Specification
<0.50 mm ≥0.50 mm
Laminate Requirement [0.0197 in] [0.0197 in] Units Test Method Ref. Para.
1. Peel Strength, minimum 3.9.1.1
A. Low profile copper foil and very low profile
copper foil – all copper foil >17µm [0.669 mil]. – –
2.4.8
B. Standard profile copper foil
N/mm [lb/in] 2.4.8.2
1. After thermal stress – 1.25 [7.14] 3.9.1.1.1
2.4.8.3
2. At 125°C [257°F] – 0.80 [4.57] 3.9.1.1.2
3. After process solutions – – 3.9.1.1.3
C. All other foil – composite – –
2. Volume Resistivity, minimum
A. C-96/35/90 – 104
MΩ–cm 2.5.17.1 3.11.1.3
B. After moisture resistance – –
C. At elevated temperature E-24/125 – –
3. Surface Resistivity, minimum
A. C-96/35/90 – 103
MΩ 2.5.17.1 3.11.1.4
B. After moisture resistance – –
C. At elevated temperature E-24/125 – –
4. Moisture Absorption, maximum – 1.0 % 2.6.2.1 3.12.1.1
5. Dielectric Breakdown, minimum – 30 kV 2.5.6 3.11.1.6
6. Permittivity at 1 MHz, maximum 2.5.5.2
3.11.1.1
(Laminate & prepreg as laminated) – 4.8 – 2.5.5.3
3.11.2.1
2.5.5.9
7. Loss Tangent at 1 MHz, maximum 2.5.5.2
3.11.1.2
(Laminate & prepreg as laminated) – 0.04 – 2.5.5.3
3.11.2.2
2.5.5.9
8. Flexural Strength, minimum
A. Length direction – 138 [20,020] N/mm2 [lb/in2] 2.4.4 3.9.1.3
B. Cross direction – 110 [16,950]
9. Flexural Strength at Elevated Temperature,
– – N/mm2 [lb/in2] 2.4.4.1 3.9.1.4
length direction, minimum
10. Arc Resistance, minimum – 20 s 2.5.1 3.11.1.5
11. Thermal Stress 10 s 260°C [500°F], minimum
A. Unetched – Pass Visual rating 2.4.13.1 3.10.1.2
B. Etched Pass Visual
12. Electric Strength, minimum 3.11.1.7
– – kV/mm 2.5.6.2
(Laminate & prepreg as laminated) 3.11.2.3
13. Flammability 3.10.2.1
– V-1 minimum rating UL94
(Laminate & prepreg as laminated) 3.10.1.1
14. Other – –
PREPREG REQUIREMENTS
Prepreg Requirement Specification Units Test Method Ref. Para.
1. Shelf Life, minimum (Condition 1/Condition 2) – Days AABUS 3.17
2. Reinforcement As per IPC-EG-140 or AABUS
3. Volatile content maximum – % 2.3.19 3.9.2.2.8
4. Prepreg Parameters – AABUS AABUS 1.1.7
5. Other –
6. Other –
*AABUS = As agreed upon between user and supplier.

33
IPC-4101A December 2001

Revision Date: December 2001

SPECIFICATION SHEET
SPECIFICATION SHEET #: IPC-4101/10
REINFORCEMENT: 1: Woven E-glass, surface 2: Cellulose paper, core
RESIN SYSTEM: Primary: Epoxy
Secondary 1: Phenolic Secondary 2: N/A
FLAME RETARDANT MECHANISM: Bromine/Antimony oxide UL94 Requirement: V-0
FILLERS: N/A
ID REFERENCE: UL/ANSI: CEM-1 MIL-S-13949: N/A
ANSI: CEM-1/10
GLASS TRANSITION (Tg): 100°C minimum
LAMINATE REQUIREMENTS
Specification Specification
<0.50 mm ≥0.50 mm
Laminate Requirement [0.0197 in] [0.0197 in] Units Test Method Ref. Para.
1. Peel Strength, minimum 3.9.1.1
A. Low profile copper foil and very low profile
copper foil – all copper foil >17µm [0.669 mil]. – –
2.4.8
B. Standard profile copper foil
N/mm [lb/in] 2.4.8.2
1. After thermal stress – 1.05 [6.00] 3.9.1.1.1
2.4.8.3
2. At 125°C [257°F] – – 3.9.1.1.2
3. After process solutions – – 3.9.1.1.3
C. All other foil – composite – –
2. Volume Resistivity, minimum
A. C-96/35/90 – 106
MΩ-cm 2.5.17.1 3.11.1.3
B. After moisture resistance – –
C. At elevated temperature E-24/125 – 103
3. Surface Resistivity, minimum
A. C-96/35/90 – 104
MΩ 2.5.17.1 3.11.1.4
B. After moisture resistance – –
C. At elevated temperature E-24/125 – 103
4. Moisture Absorption, maximum – 0.5 % 2.6.2.1 3.12.1.1
5. Dielectric Breakdown, minimum – 40 kV 2.5.6 3.11.1.6
6. Permittivity at 1 MHz, maximum 2.5.5.2
3.11.1.1
(Laminate & prepreg as laminated) – 5.4 – 2.5.5.3
3.11.2.1
2.5.5.9
7. Loss Tangent at 1 MHz, maximum 2.5.5.2
3.11.1.2
(Laminate & prepreg as laminated) – 0.035 – 2.5.5.3
3.11.2.2
2.5.5.9
8. Flexural Strength, minimum
A. Length direction – 242 [35,100]** N/mm2 [lb/in2] 2.4.4 3.9.1.3
B. Cross direction – 172 [24,950]
9. Flexural Strength at Elevated Temperature,
– – N/mm2 [lb/in2] 2.4.4.1 3.9.1.4
length direction, minimum
10. Arc Resistance, minimum – 60 s 2.5.1 3.11.1.5
11. Thermal Stress 10 s 260°C [500°F], minimum
A. Unetched – Pass Visual rating 2.4.13.1 3.10.1.2
B. Etched –
12. Electric Strength, minimum 3.11.1.7
– – kV/mm 2.5.6.2
(Laminate & prepreg as laminated) 3.11.2.3
13. Flammability 3.10.2.1
– V-0 rating UL94
(Laminate & prepreg as laminated) 3.10.1.1
14. Other – –
PREPREG REQUIREMENTS
Prepreg Requirement Specification Units Test Method Ref. Para.
1. Shelf Life, minimum (Condition 1/Condition 2) – Days AABUS 3.17
2. Reinforcement As per IPC-4110 and IPC-4412 or AABUS.
3. Volatile content maximum – % 2.3.19 3.9.2.2.8
4. Prepreg Parameters – AABUS AABUS 1.1.7
5. Other –
6. Other –
*AABUS = As agreed upon between user and supplier.
**As measured on a 1.57 mm [0.06181 in] thick sample.

34
December 2001 IPC-4101A

Revision Date: December 2001

SPECIFICATION SHEET
SPECIFICATION SHEET #: IPC-4101/11
REINFORCEMENT: 1: Woven E-glass, surface 2: Nonwoven E-glass core
RESIN SYSTEM: Primary: Polyester
Secondary 1: Vinyl ester Secondary 2: N/A
FLAME RETARDANT MECHANISM: Bromine
FILLERS: Inorganic fillers
ID REFERENCE: UL/ANSI: N/A MIL-S-13949: N/A
ANSI: CRM-5/11
GLASS TRANSITION (Tg): N/A
LAMINATE REQUIREMENTS
Specification Specification
<0.50 mm ≥0.50 mm
Laminate Requirement [0.0197 in] [0.0197 in] Units Test Method Ref. Para.
1. Peel Strength, minimum 3.9.1.1
A. Low profile copper foil and very low profile
copper foil – all copper foil >17µm [0.669 mil]. – –
2.4.8
B. Standard profile copper foil
N/mm [lb/in] 2.4.8.2
1. After thermal stress – 0.90 [5.14] 3.9.1.1.1
2.4.8.3
2. At 125°C [257°F] – AABUS 3.9.1.1.2
3. After process solutions – 0.70 [4.00] 3.9.1.1.3
C. All other foil – composite – –
2. Volume Resistivity, minimum
A. C-96/35/90 – 107
MΩ–cm 2.5.17.1 3.11.1.3
B. After moisture resistance – –
C. At elevated temperature E-24/125 – –
3. Surface Resistivity, minimum
A. C-96/35/90 – 106
MΩ 2.5.17.1 3.11.1.4
B. After moisture resistance – –
C. At elevated temperature E-24/125 – –
4. Moisture Absorption, maximum – 0.5 % 2.6.2.1 3.12.1.1
5. Dielectric Breakdown, minimum – 40 kV 2.5.6 3.11.1.6
6. Permittivity at 1 MHz, maximum 2.5.5.2
3.11.1.1
(Laminate & prepreg as laminated) – 4.1 – 2.5.5.3
3.11.2.1
2.5.5.9
7. Loss Tangent at 1 MHz, maximum 2.5.5.2
3.11.1.2
(Laminate & prepreg as laminated) – 0.022 – 2.5.5.3
3.11.2.2
2.5.5.9
8. Flexural Strength, minimum
A. Length direction – 241 [34,950] N/mm2 [lb/in2] 2.4.4 3.9.1.3
B. Cross direction – 138 [20,020]
9. Flexural Strength at Elevated Temperature,
– – N/mm2 [lb/in2] 2.4.4.1 3.9.1.4
length direction, minimum
10. Arc Resistance, minimum – 60 s 2.5.1 3.11.1.5
11. Thermal Stress 10 s 260°C [500°F], minimum
A. Unetched – Pass Visual rating 2.4.13.1 3.10.1.2
B. Etched –
12. Electric Strength, minimum 3.11.1.7
– – kV/mm 2.5.6.2
(Laminate & prepreg as laminated) 3.11.2.3
13. Flammability 3.10.2.1
– V-1 minimum rating UL94
(Laminate & prepreg as laminated) 3.10.1.1
14. Other – –
PREPREG REQUIREMENTS
Prepreg Requirement Specification Units Test Method Ref. Para.
1. Shelf Life, minimum (Condition 1/Condition 2) – Days AABUS 3.17
2. Reinforcement As per IPC-4412 and IPC-4130 or AABUS.
3. Volatile content maximum – % 2.3.19 3.9.2.2.8
4. Prepreg Parameters – AABUS AABUS 1.1.7
5. Other –
6. Other –
*AABUS = As agreed upon between user and supplier.

35
IPC-4101A December 2001

Revision Date: December 2001

SPECIFICATION SHEET
SPECIFICATION SHEET #: IPC-4101/12
REINFORCEMENT: 1: Woven E-glass, surface 2: Nonwoven E-glass core
RESIN SYSTEM: Primary: Epoxy
Secondary 1: N/A Secondary 2: N/A
FLAME RETARDANT MECHANISM: Bromine UL94 Requirement: V-0
FILLERS: With or without inorganic fillers
ID REFERENCE: UL/ANSI: CEM-3 MIL-S-13949: N/A
ANSI: CEM-3/12
GLASS TRANSITION (Tg): N/A
LAMINATE REQUIREMENTS
Specification Specification
<0.50 mm ≥0.50 mm
Laminate Requirement [0.0197 in] [0.0197 in] Units Test Method Ref. Para.
1. Peel Strength, minimum 3.9.1.1
A. Low profile copper foil and very low profile
copper foil – all copper foil >17µm [0.669 mil].
B. Standard profile copper foil – – 2.4.8
1. After thermal stress N/mm [lb/in] 2.4.8.2
2. At 105°C [221°F] – 1.05 [6.00] 2.4.8.3 3.9.1.1.1
3. After process solutions – 0.90 [5.14] 3.9.1.1.2
C. All other foil – composite – 0.90 [5.14] 3.9.1.1.3
– –
2. Volume Resistivity, minimum
A. C-96/35/90 – 106
MΩ–cm 2.5.17.1 3.11.1.3
B. After moisture resistance – –
C. At elevated temperature E-24/125 – 103
3. Surface Resistivity, minimum
A. C-96/35/90 – 104
MΩ 2.5.17.1 3.11.1.4
B. After moisture resistance – –
C. At elevated temperature E-24/125 – 103
4. Moisture Absorption, maximum – 0.5 % 2.6.2.1 3.12.1.1
5. Dielectric Breakdown, minimum – 40 kV 2.5.6 3.11.1.6
6. Permittivity at 1 MHz, maximum 2.5.5.2
3.11.1.1
(Laminate & prepreg as laminated) – 5.4 – 2.5.5.3
3.11.2.1
2.5.5.9
7. Loss Tangent at 1 MHz, maximum 2.5.5.2
3.11.1.2
(Laminate & prepreg as laminated) – 0.035 – 2.5.5.3
3.11.2.2
2.5.5.9
8. Flexural Strength, minimum
A. Length direction – 276 [40,030]** N/mm2 [lb/in2] 2.4.4 3.9.1.3
B. Cross direction – 186 [26,980]
9. Flexural Strength at Elevated Temperature,
– – N/mm2 [lb/in2] 2.4.4.1 3.9.1.4
length direction, minimum
10. Arc Resistance, minimum – 60 s 2.5.1 3.11.1.5
11. Thermal Stress 10 s 260°C [500°F], minimum
A. Unetched – Pass Visual rating 2.4.13.1 3.10.1.2
B. Etched –
12. Electric Strength, minimum 3.11.1.7
– – kV/mm 2.5.6.2
(Laminate & prepreg as laminated) 3.11.2.3
13. Flammability 3.10.2.1
– V-0 rating UL94
(Laminate & prepreg as laminated) 3.10.1.1
14. Other – –
PREPREG REQUIREMENTS
Prepreg Requirement Specification Units Test Method Ref. Para.
1. Shelf Life, minimum (Condition 1/Condition 2) – Days AABUS 3.17
2. Reinforcement As per IPC-4412 and IPC-4130 or AABUS.
3. Volatile content maximum – % 2.3.19 3.9.2.2.8
4. Prepreg Parameters – AABUS AABUS 1.1.7
5. Other –
6. Other –
*AABUS = As agreed upon between user and supplier.
**As measured on a 1.57 mm [0.06181 in] thick sample.

36
December 2001 IPC-4101A

Revision Date: December 2001

SPECIFICATION SHEET
SPECIFICATION SHEET #: IPC-4101/13
REINFORCEMENT: 1: Woven E-glass 2: N/A
RESIN SYSTEM: Primary: Polyester
Secondary 1: Vinyl ester Secondary 2: N/A
FLAME RETARDANT MECHANISM: Bromine
FILLERS: Inorganic fillers
ID REFERENCE: UL/ANSI: N/A MIL-S-13949: N/A
ANSI: 4101/13
GLASS TRANSITION (Tg): N/A
LAMINATE REQUIREMENTS
Specification Specification
<0.50 mm ≥0.50 mm
Laminate Requirement [0.0197 in] [0.0197 in] Units Test Method Ref. Para.
1. Peel Strength, minimum 3.9.1.1
A. Low profile copper foil and very low profile
copper foil – all copper foil >17µm [0.669 mil]. AABUS –
2.4.8
B. Standard profile copper foil
N/mm [lb/in] 2.4.8.2
1. After thermal stress 0.70 [4.00] – 3.9.1.1.1
2.4.8.3
2. At 125°C [257°F] 0.60 [3.43] – 3.9.1.1.2
3. After process solutions 0.70 [4.00] – 3.9.1.1.3
C. All other foil – composite AABUS –
2. Volume Resistivity, minimum
A. C-96/35/90 106 –
MΩ–cm 2.5.17.1 3.11.1.3
B. After moisture resistance – –
C. At elevated temperature E-24/125 103 –
3. Surface Resistivity, minimum
A. C-96/35/90 106 –
MΩ 2.5.17.1 3.11.1.4
B. After moisture resistance – –
C. At elevated temperature E-24/125 103 –
4. Moisture Absorption, maximum 0.30 – % 2.6.2.1 3.12.1.1
5. Dielectric Breakdown, minimum – – kV 2.5.6 3.11.1.6
6. Permittivity at 1 MHz, maximum 2.5.5.2
3.11.1.1
(Laminate & prepreg as laminated) AABUS – – 2.5.5.3
3.11.2.1
2.5.5.9
7. Loss Tangent at 1 MHz, maximum 2.5.5.2
3.11.1.2
(Laminate & prepreg as laminated) AABUS – – 2.5.5.3
3.11.2.2
2.5.5.9
8. Flexural Strength, minimum
A. Length direction – – N/mm2 [lb/in2] 2.4.4 3.9.1.3
B. Cross direction – –
9. Flexural Strength at Elevated Temperature, length
– – N/mm2 [lb/in2] 2.4.4.1 3.9.1.4
direction, minimum
10. Arc Resistance, minimum 60 – s 2.5.1 3.11.1.5
11. Thermal Stress 10 s at 288°C [550.4°F], minimum
A. Unetched Pass Visual – rating 2.4.13.1 3.10.1.2
B. Etched Pass Visual –
12. Electric Strength, minimum 3.11.1.7
30 – kV/mm 2.5.6.2
(Laminate & prepreg as laminated) 3.11.2.3
13. Flammability 3.10.2.1
V-1 minimum – rating UL94
(Laminate & prepreg as laminated) 3.10.1.1
14. Other – –
PREPREG REQUIREMENTS
Prepreg Requirement Specification Units Test Method Ref. Para.
1. Shelf Life, minimum (Condition 1/Condition 2) N/A N/A N/A N/A
2. Reinforcement As per IPC-4412 or AABUS.
3. Volatile content maximum N/A N/A N/A N/A
4. Prepreg Parameters N/A N/A N/A N/A
5. Other N/A
6. Other N/A
*AABUS = As agreed upon between user and supplier.

37
IPC-4101A December 2001

Revision Date: December 2001

SPECIFICATION SHEET
SPECIFICATION SHEET #: IPC-4101/20
REINFORCEMENT: 1: Woven E-glass 2: N/A
RESIN SYSTEM: Primary: Epoxy
Secondary 1: N/A Secondary 2: N/A
FLAME RETARDANT MECHANISM: N/A UL94 Requirement: HB
FILLERS: N/A
ID REFERENCE: UL/ANSI: G-10 MIL-S-13949: /03 - GE, GEN
ANSI: G-10/20
GLASS TRANSITION (Tg): N/A
LAMINATE REQUIREMENTS
Specification Specification
<0.50 mm ≥0.50 mm
Laminate Requirement [0.0197 in] [0.0197 in] Units Test Method Ref. Para.
1. Peel Strength, minimum 3.9.1.1
A. Low profile copper foil and very low profile
copper foil – all copper foil >17µm [0.669 mil]. AABUS AABUS
2.4.8
B. Standard profile copper foil
N/mm [lb/in] 2.4.8.2
1. After thermal stress 0.80 [4.57] 1.05 [6.00] 3.9.1.1.1
2.4.8.3
2. At 125°C [257°F] AABUS 0.70 [4.00] 3.9.1.1.2
3. After process solutions AABUS 0.80 [4.57] 3.9.1.1.3
C. All other foil – composite AABUS AABUS
2. Volume Resistivity, minimum
A. C-96/35/90 106 –
MΩ–cm 2.5.17.1 3.11.1.3
B. After moisture resistance – 106
C. At elevated temperature E-24/125 103 103
3. Surface Resistivity, minimum
A. C-96/35/90 104 –
MΩ 2.5.17.1 3.11.1.4
B. After moisture resistance – 104
C. At elevated temperature E-24/125 103 103
4. Moisture Absorption, maximum – 0.35 % 2.6.2.1 3.12.1.1
5. Dielectric Breakdown, minimum – 40 kV 2.5.6 3.11.1.6
6. Permittivity at 1 MHz, maximum 2.5.5.2
3.11.1.1
(Laminate & prepreg as laminated) 5.4 5.4 – 2.5.5.3
3.11.2.1
2.5.5.9
7. Loss Tangent at 1 MHz, maximum 2.5.5.2
3.11.1.2
(Laminate & prepreg as laminated) 0.035 0.035 – 2.5.5.3
3.11.2.2
2.5.5.9
8. Flexural Strength, minimum
A. Length direction – 414 [60,050] N/mm2 [lb/in2] 2.4.4 3.9.1.3
B. Cross direction – 345 [50,040]
9. Flexural Strength at Elevated Temperature,
– – N/mm2 [lb/in2] 2.4.4.1 3.9.1.4
length direction, minimum
10. Arc Resistance, minimum 60 60 s 2.5.1 3.11.1.5
11. Thermal Stress 10 s at 288°C [550.4°F], minimum
A. Unetched Pass Visual Pass Visual rating 2.4.13.1 3.10.1.2
B. Etched Pass Visual Pass Visual
12. Electric Strength, minimum 3.11.1.7
30 – kV/mm 2.5.6.2
(Laminate & prepreg as laminated) 3.11.2.3
13. Flammability 3.10.2.1
HB HB rating UL94
(Laminate & prepreg as laminated) 3.10.1.1
14. Other – –
PREPREG REQUIREMENTS
Prepreg Requirement Specification Units Test Method Ref. Para.
1. Shelf Life, minimum (Condition 1/Condition 2) 180/90 Days AABUS 3.17
2. Reinforcement As per IPC-4412 or AABUS.
3. Volatile content maximum – % 2.3.19 3.9.2.2.8
4. Prepreg Parameters – AABUS AABUS 1.1.7
5. Flammability (as laminated) HB rating UL94 3.10.2.1
6. Other –
*AABUS = As agreed upon between user and supplier.

38
December 2001 IPC-4101A

Revision Date: December 2001

SPECIFICATION SHEET
SPECIFICATION SHEET #: IPC-4101/21
REINFORCEMENT: 1: Woven E-glass 2: N/A
RESIN SYSTEM: Primary: Difunctional epoxy
Secondary 1: Multifunctional epoxy Secondary 2: N/A
FLAME RETARDANT MECHANISM: Bromine Minimum UL94 Requirement: V-1
FILLERS: N/A
ID REFERENCE: UL/ANSI: FR-4 MIL-S-13949: /04 - GF, GFN, GFK, GFP, GFM
ANSI: FR-4/21
GLASS TRANSITION (Tg): 110°C to 150°C
LAMINATE REQUIREMENTS
Specification Specification
<0.50 mm ≥0.50 mm
Laminate Requirement [0.0197 in] [0.0197 in] Units Test Method Ref. Para.
1. Peel Strength, minimum 3.9.1.1
A. Low profile copper foil and very low profile
copper foil – all copper foil >17µm [0.669 mil]. 0.70 [4.00] 0.70 [4.00]
2.4.8
B. Standard profile copper foil
N/mm [lb/in] 2.4.8.2
1. After thermal stress 0.80 [4.57] 1.05 [6.00] 3.9.1.1.1
2.4.8.3
2. At 125°C [257°F] 0.70 [4.00] 0.70 [4.00] 3.9.1.1.2
3. After process solutions 0.55 [3.14] 0.80 [4.57] 3.9.1.1.3
C. All other foil – composite AABUS AABUS
2. Volume Resistivity, minimum
A. 96/35/90 106 –
MΩ–cm 2.5.17.1 3.11.1.3
B. After moisture resistance – 106
C. At elevated temperature E-24/125 103 103
3. Surface Resistivity, minimum
A. 96/35/90 104 –
MΩ 2.5.17.1 3.11.1.4
B. After moisture resistance – 104
C. At elevated temperature E-24/125 103 103
4. Moisture Absorption, maximum – 0.80 % 2.6.2.1 3.12.1.1
5. Dielectric Breakdown, minimum – 40 kV 2.5.6 3.11.1.6
6. Permittivity at 1 MHz, maximum 2.5.5.2
3.11.1.1
(Laminate & prepreg as laminated) 5.4 5.4 – 2.5.5.3
3.11.2.1
2.5.5.9
7. Loss Tangent at 1 MHz, maximum 2.5.5.2
3.11.1.2
(Laminate & prepreg as laminated) 0.035 0.035 – 2.5.5.3
3.11.2.2
2.5.5.9
8. Flexural Strength, minimum
A. Length direction – 415 [60,190] N/mm2 [lb/in2] 2.4.4 3.9.1.3
B. Cross direction – 345 [50,040]
9. Flexural Strength at Elevated Temperature,
– – N/mm2 [lb/in2] 2.4.4.1 3.9.1.4
length direction, minimum
10. Arc Resistance, minimum 60 60 s 2.5.1 3.11.1.5
11. Thermal Stress 10 s at 288°C [550.4°F], minimum
A. Unetched Pass Visual Pass Visual rating 2.4.13.1 3.10.1.2
B. Etched Pass Visual Pass Visual
12. Electric Strength, minimum 3.11.1.7
30 – kV/mm 2.5.6.2
(Laminate & prepreg as laminated) 3.11.2.3
13. Flammability 3.10.2.1
V-1 minimum V-1 minimum rating UL94
(Laminate & prepreg as laminated) 3.10.1.1
14. Other – –
PREPREG REQUIREMENTS
Prepreg Requirement Specification Units Test Method Ref. Para.
1. Shelf Life, minimum (Condition 1/Condition 2) 180/90 Days AABUS 3.17
2. Reinforcement As per IPC-4412 or AABUS.
3. Volatile content maximum 0.75 % 2.3.19 3.9.2.2.8
4. Prepreg Parameters – AABUS AABUS 1.1.7
5. Flammability (as laminated) V-1 minimum rating UL94 3.10.2.1
6. Other –
*AABUS = As agreed upon between user and supplier.

39
IPC-4101A December 2001

Revision Date: December 2001

SPECIFICATION SHEET
SPECIFICATION SHEET #: IPC-4101/22
REINFORCEMENT: 1: Woven E-glass 2: N/A
RESIN SYSTEM: Primary: Epoxy, hot strength retention
Secondary 1: N/A Secondary 2: N/A
FLAME RETARDANT MECHANISM: N/A UL94 Requirement: HB
FILLERS: N/A
ID REFERENCE: UL/ANSI: G-11 MIL-S-13949: /02 - GB, GBN, GBP
ANSI: G-11/22
GLASS TRANSITION (Tg): 135°C - 175°C
LAMINATE REQUIREMENTS
Specification Specification
<0.50 mm ≥0.50 mm
Laminate Requirement [0.0197 in] [0.0197 in] Units Test Method Ref. Para.
1. Peel Strength, minimum 3.9.1.1
A. Low profile copper foil and very low profile
copper foil – all copper foil >17µm [0.669 mil]. AABUS AABUS
2.4.8
B. Standard profile copper foil
N/mm [lb/in] 2.4.8.2
1. After thermal stress 1.05 [6.00] 1.45 [8.28] 3.9.1.1.1
2.4.8.3
2. At 150°C [302°F] 0.80 [4.57] 0.90 [5.14] 3.9.1.1.2
3. After process solutions 0.80 [4.57] 0.90 [5.14] 3.9.1.1.3
C. All other foil – composite AABUS AABUS
2. Volume Resistivity, minimum
A. After humidity conditioning 106 104 MΩ–cm 2.5.17.1 3.11.1.3
B. At elevated temperature (150°C [302°F]) 103 103
3. Surface Resistivity, minimum
A. After humidity conditioning 104 –
MΩ 2.5.17.1 3.11.1.4
B. At elevated temperature (150°C [302°F]) – 104
103 103
4. Moisture Absorption, maximum – 0.80 % 2.6.2.1 3.12.1.1
5. Dielectric Breakdown, minimum – 40 kV 2.5.6 3.11.1.6
6. Permittivity at 1 MHz, maximum 2.5.5.2
3.11.1.1
(Laminate & prepreg as laminated) 5.4 5.4 – 2.5.5.3
3.11.2.1
2.5.5.9
7. Loss Tangent at 1 MHz, maximum 2.5.5.2
3.11.1.2
(Laminate & prepreg as laminated) 0.035 0.035 – 2.5.5.3
3.11.2.2
2.5.5.9
8. Flexural Strength, minimum
A. Length direction 415 [60,190] 415 [60,190] N/mm2 [lb/in2] 2.4.4 3.9.1.3
B. Cross direction 345 [50,040] 345 [50,040]
9. Flexural Strength at Elevated Temperature 150°C,
207 [30,020] 207 [30,020] N/mm2 [lb/in2] 2.4.4.1 3.9.1.4
length direction, minimum
10. Arc Resistance, minimum 60 60 s 2.5.1 3.11.1.5
11. Thermal Stress 10 s at 288°C [550.4°F], minimum
A. Unetched Pass Visual Pass Visual rating 2.4.13.1 3.10.1.2
B. Etched Pass Visual Pass Visual
12. Electric Strength, minimum 3.11.1.7
30 – kV/mm 2.5.6.2
(Laminate & prepreg as laminated) 3.11.2.3
13. Flammability 3.10.2.1
HB HB rating UL94
(Laminate & prepreg as laminated) 3.10.1.1
14. Other – –
PREPREG REQUIREMENTS
Prepreg Requirement Specification Units Test Method Ref. Para.
1. Shelf Life, minimum (Condition 1/Condition 2) 180/90 Days AABUS 3.17
2. Reinforcement As per IPC-4412 or AABUS.
3. Volatile content maximum – % 2.3.19 3.9.2.2.8
4. Prepreg Parameters – AABUS AABUS 1.1.7
5. Flammability (as laminated) HB rating UL94 3.10.2.1
6. Other –

40
December 2001 IPC-4101A

Revision Date: December 2001

SPECIFICATION SHEET
SPECIFICATION SHEET #: IPC-4101/23
REINFORCEMENT: 1: Woven E-glass 2: N/A
RESIN SYSTEM: Primary: Epoxy, hot strength retention
Secondary 1: N/A Secondary 2: N/A
FLAME RETARDANT MECHANISM: Bromine Minimum UL94 Requirement: V-1
FILLERS: N/A
ID REFERENCE: UL/ANSI: FR-5 MIL-S-13949: /05 - GH, GHN, GHP
ANSI: FR-5/23
GLASS TRANSITION (Tg): 135°C - 185°C
LAMINATE REQUIREMENTS
Specification Specification
<0.50 mm ≥0.50 mm
Laminate Requirement [0.0197 in] [0.0197 in] Units Test Method Ref. Para.
1. Peel Strength, minimum 3.9.1.1
A. Low profile copper foil and very low profile
copper foil – all copper foil >17µm [0.669 mil]. AABUS AABUS
2.4.8
B. Standard profile copper foil
N/mm [lb/in] 2.4.8.2
1. After thermal stress 1.05 [6.00] 1.45 [8.28] 3.9.1.1.1
2.4.8.3
2. At 150°C [302°F] 0.80 [4.57] 0.90 [5.14] 3.9.1.1.2
3. After process solutions 0.80 [4.57] 0.90 [5.14] 3.9.1.1.3
C. All other foil – composite AABUS AABUS
2. Volume Resistivity, minimum
A. After humidity conditioning 106 104 MΩ–cm 2.5.17.1 3.11.1.3
B. At elevated temperature (150°C [302°F]) 103 103
3. Surface Resistivity, minimum
A. After humidity conditioning 104 104 MΩ 2.5.17.1 3.11.1.4
B. At elevated temperature (150°C [302°F]) 103 103
4. Moisture Absorption, maximum – 0.80 % 2.6.2.1 3.12.1.1
5. Dielectric Breakdown, minimum – 40 kV 2.5.6 3.11.1.6
6. Permittivity at 1 MHz, maximum 2.5.5.2
3.11.1.1
(Laminate & prepreg as laminated) 5.4 5.4 – 2.5.5.3
3.11.2.1
2.5.5.9
7. Loss Tangent at 1 MHz, maximum 2.5.5.2
3.11.1.2
(Laminate & prepreg as laminated) 0.035 0.035 – 2.5.5.3
3.11.2.2
2.5.5.9
8. Flexural Strength, minimum
A. Length direction – 415 [60,190] N/mm2 [lb/in2] 2.4.4 3.9.1.3
B. Cross direction – 345 [50,040]
9. Flexural Strength at Elevated Temperature 150°C,
– 207 [30,020] N/mm2 [lb/in2] 2.4.4.1 3.9.1.4
length direction, minimum
10. Arc Resistance, minimum 60 60 s 2.5.1 3.11.1.5
11. Thermal Stress 10 s at 288°C [550.4°F], minimum
A. Unetched Pass Visual Pass Visual rating 2.4.13.1 3.10.1.2
B. Etched Pass Visual Pass Visual
12. Electric Strength, minimum 3.11.1.7
30 – kV/mm 2.5.6.2
(Laminate & prepreg as laminated) 3.11.2.3
13. Flammability 3.10.2.1
V-1 minimum V-1 minimum rating UL94
(Laminate & prepreg as laminated) 3.10.1.1
14. Other – –
PREPREG REQUIREMENTS
Prepreg Requirement Specification Units Test Method Ref. Para.
1. Shelf Life, minimum (Condition 1/Condition 2) 180/90 Days AABUS 3.17
2. Reinforcement As per IPC-4412 or AABUS.
3. Volatile content maximum 0.75 % 2.3.19 3.9.2.2.8
4. Prepreg Parameters – AABUS AABUS 1.1.7
5. Flammability (as laminated) V-1 minimum rating UL94 3.10.2.1
6. Other –
*AABUS = As agreed upon between user and supplier.

41
IPC-4101A December 2001

Revision Date: December 2001

SPECIFICATION SHEET
SPECIFICATION SHEET #: IPC-4101/24
REINFORCEMENT: 1: Woven E-glass 2: N/A
RESIN SYSTEM: Primary: Epoxy
Secondary 1: Multifunctional epoxy Secondary 2: N/A
FLAME RETARDANT MECHANISM: Bromine Minimum UL94 Requirement: V-1
FILLERS: N/A
ID REFERENCE: UL/ANSI: FR-4 MIL-S-13949: /04 - GF, GFG, GFN
ANSI: FR-4/24
GLASS TRANSITION (Tg): 150°C - 200°C
LAMINATE REQUIREMENTS
Specification Specification
<0.50 mm ≥0.50 mm
Laminate Requirement [0.0197 in] [0.0197 in] Units Test Method Ref. Para.
1. Peel Strength, minimum 3.9.1.1
A. Low profile copper foil and very low profile
copper foil – all copper foil >17µm [0.669 mil]. 0.70 [4.00] 0.70 [4.00]
2.4.8
B. Standard profile copper foil
N/mm [lb/in] 2.4.8.2
1. After thermal stress 0.80 [4.57] 1.05 [6.00] 3.9.1.1.1
2.4.8.3
2. At 125°C [257°F] 0.70 [4.00] 0.70 [4.00] 3.9.1.1.2
3. After process solutions 0.55 [3.14] 0.80 [4.57] 3.9.1.1.3
C. All other foil – composite AABUS AABUS
2. Volume Resistivity, minimum
A. C-96/35/90 106 –
MΩ–cm 2.5.17.1 3.11.1.3
B. After moisture resistance – 104
C. At elevated temperature E-24/125 103 103
3. Surface Resistivity, minimum
A. C-96/35/90 104 –
MΩ 2.5.17.1 3.11.1.4
B. After moisture resistance – 104
C. At elevated temperature E-24/125 103 103
4. Moisture Absorption, maximum – 0.80 % 2.6.2.1 3.12.1.1
5. Dielectric Breakdown, minimum – 40 kV 2.5.6 3.11.1.6
6. Permittivity at 1 MHz, maximum 2.5.5.2
3.11.1.1
(Laminate & prepreg as laminated) 5.4 5.4 – 2.5.5.3
3.11.2.1
2.5.5.9
7. Loss Tangent at 1 MHz, maximum 2.5.5.2
3.11.1.2
(Laminate & prepreg as laminated) 0.035 0.035 – 2.5.5.3
3.11.2.2
2.5.5.9
8. Flexural Strength, minimum
A. Length direction – 415 [60,190] N/mm2 [lb/in2] 2.4.4 3.9.1.3
B. Cross direction – 345 [50,040]
9. Flexural Strength at Elevated Temperature, length
– – N/mm2 [lb/in2] 2.4.4.1 3.9.1.4
direction, minimum
10. Arc Resistance, minimum 60 60 s 2.5.1 3.11.1.5
11. Thermal Stress 10 s at 288°C [550.4°F], minimum
A. Unetched Pass Visual Pass Visual rating 2.4.13.1 3.10.1.2
B. Etched Pass Visual Pass Visual
12. Electric Strength, minimum 3.11.1.7
30 – kV/mm 2.5.6.2
(Laminate & prepreg as laminated) 3.11.2.3
13. Flammability 3.10.2.1
V-1 minimum V-1 minimum rating UL94
(Laminate & prepreg as laminated) 3.10.1.1
14. Other – –
PREPREG REQUIREMENTS
Prepreg Requirement Specification Units Test Method Ref. Para.
1. Shelf Life, minimum (Condition 1/Condition 2) 180/90 Days AABUS 3.17
2. Reinforcement As per IPC-4412 or AABUS.
3. Volatile content maximum 1.5 % 2.3.19 3.9.2.2.8
4. Prepreg Parameters – AABUS AABUS 1.1.7
5. Flammability (as laminated) V-1 minimum rating UL94 3.10.2.1
6. Other –
*AABUS = As agreed upon between user and supplier.

42
December 2001 IPC-4101A

Revision Date: December 2001

SPECIFICATION SHEET
SPECIFICATION SHEET #: IPC-4101/25
REINFORCEMENT: 1: Woven E-glass 2: N/A
RESIN SYSTEM: Primary: Epoxy
Secondary 1: Polyphenylene oxide Secondary 2: N/A
FLAME RETARDANT MECHANISM: Bromine
FILLERS: N/A
ID REFERENCE: UL/ANSI: N/A MIL-S-13949: /04 - GF, GFG, GFN
ANSI: 4101/25
GLASS TRANSITION (Tg): 150°C - 200°C
LAMINATE REQUIREMENTS
Specification Specification
<0.50 mm ≥0.50 mm
Laminate Requirement [0.0197 in] [0.0197 in] Units Test Method Ref. Para.
1. Peel Strength, minimum 3.9.1.1
A. Low profile copper foil and very low profile
copper foil – all copper foil >17µm [0.669 mil]. 0.70 [4.00] 0.70 [4.00]
2.4.8
B. Standard profile copper foil
N/mm [lb/in] 2.4.8.2
1. After thermal stress 0.80 [4.57] 1.05 [6.00] 3.9.1.1.1
2.4.8.3
2. At 125°C [257°F] 0.70 [4.00] 0.70 [4.00] 3.9.1.1.2
3. After process solutions 0.55 [3.14] 0.80 [4.57] 3.9.1.1.3
C. All other foil – composite AABUS AABUS
2. Volume Resistivity, minimum
A. C-96/35/90 106 –
MΩ–cm 2.5.17.1 3.11.1.3
B. After moisture resistance – 106
C. At elevated temperature E-24/125 103 103
3. Surface Resistivity, minimum
A. C-96/35/90 104 –
MΩ 2.5.17.1 3.11.1.4
B. After moisture resistance – 104
C. At elevated temperature E-24/125 103 103
4. Moisture Absorption, maximum – 0.80 % 2.6.2.1 3.12.1.1
5. Dielectric Breakdown, minimum – 40 kV 2.5.6 3.11.1.6
6. Permittivity at 1 MHz, maximum 2.5.5.2
3.11.1.1
(Laminate & prepreg as laminated) 4.4 4.4 – 2.5.5.3
3.11.2.1
2.5.5.9
7. Loss Tangent at 1 MHz, maximum 2.5.5.2
3.11.1.2
(Laminate & prepreg as laminated) 0.035 0.035 – 2.5.5.3
3.11.2.2
2.5.5.9
8. Flexural Strength, minimum
A. Length direction – 415 [60,190] N/mm2 [lb/in2] 2.4.4 3.9.1.3
B. Cross direction – 345 [50,040]
9. Flexural Strength at Elevated Temperature, length
– – N/mm2 [lb/in2] 2.4.4.1 3.9.1.4
direction, minimum
10. Arc Resistance, minimum 60 60 s 2.5.1 3.11.1.5
11. Thermal Stress 10 s at 288°C [550.4°F], minimum
A. Unetched Pass Visual Pass Visual rating 2.4.13.1 3.10.1.2
B. Etched Pass Visual Pass Visual
12. Electric Strength, minimum 3.11.1.7
30 – kV/mm 2.5.6.2
(Laminate & prepreg as laminated) 3.11.2.3
13. Flammability 3.10.2.1
V-1 minimum V-1 minimum rating UL94
(Laminate & prepreg as laminated) 3.10.1.1
14. Other – –
PREPREG REQUIREMENTS
Prepreg Requirement Specification Units Test Method Ref. Para.
1. Shelf Life, minimum (Condition 1/Condition 2) 180/90 Days AABUS 3.17
2. Reinforcement As per IPC-4412 or AABUS.
3. Volatile content maximum 0.5 % 2.3.19 3.9.2.2.8
4. Prepreg Parameters – AABUS AABUS 1.1.7
5. Flammability (as laminated) V-1 minimum rating UL94 3.10.2.1
6. Other –
*AABUS = As agreed upon between user and supplier.

43
IPC-4101A December 2001

Revision Date: December 2001

SPECIFICATION SHEET
SPECIFICATION SHEET #: IPC-4101/26
REINFORCEMENT: 1: Woven E-glass 2: N/A
RESIN SYSTEM: Primary: Epoxy
Secondary 1: Multifunctional epoxy Secondary 2: N/A
FLAME RETARDANT MECHANISM: Bromine Minimum UL94 Requirement: V-1
FILLERS: N/A
ID REFERENCE: UL/ANSI: FR-4 MIL-S-13949: /04 - GF, GFT
ANSI: FR-4/26
GLASS TRANSITION (Tg): 170°C - 220°C
LAMINATE REQUIREMENTS
Specification Specification
<0.50 mm ≥0.50 mm
Laminate Requirement [0.0197 in] [0.0197 in] Units Test Method Ref. Para.
1. Peel Strength, minimum 3.9.1.1
A. Low profile copper foil and very low profile
copper foil – all copper foil >17µm [0.669 mil]. 0.70 [4.00] 0.70 [4.00]
2.4.8
B. Standard profile copper foil
N/mm [lb/in] 2.4.8.2
1. After thermal stress 0.80 [4.57] 1.05 [6.00] 3.9.1.1.1
2.4.8.3
2. At 125°C [257°F] 0.70 [4.00] 0.70 [4.00] 3.9.1.1.2
3. After process solutions 0.55 [3.14] 0.80 [4.57] 3.9.1.1.3
C. All other foil – composite AABUS AABUS
2. Volume Resistivity, minimum
A. C-96/35/90 106 –
MΩ–cm 2.5.17.1 3.11.1.3
B. After moisture resistance – 106
C. At elevated temperature E-24/125 103 103
3. Surface Resistivity, minimum
A. C-96/35/90 104 –
MΩ 2.5.17.1 3.11.1.4
B. After moisture resistance – 104
C. At elevated temperature E-24/125 103 103
4. Moisture Absorption, maximum – 0.80 % 2.6.2.1 3.12.1.1
5. Dielectric Breakdown, minimum – 40 kV 2.5.6 3.11.1.6
6. Permittivity at 1 MHz, maximum 2.5.5.2
3.11.1.1
(Laminate & prepreg as laminated) 4.3 4.5 – 2.5.5.3
3.11.2.1
2.5.5.9
7. Loss Tangent at 1 MHz, maximum 2.5.5.2
3.11.1.2
(Laminate & prepreg as laminated) 0.025 0.025 – 2.5.5.3
3.11.2.2
2.5.5.9
8. Flexural Strength, minimum
A. Length direction – 415 [60,190] N/mm2 [lb/in2] 2.4.4 3.9.1.3
B. Cross direction – 345 [50,040]
9. Flexural Strength at Elevated Temperature, length
– – N/mm2 [lb/in2] 2.4.4.1 3.9.1.4
direction, minimum
10. Arc Resistance, minimum 60 60 s 2.5.1 3.11.1.5
11. Thermal Stress 10 s at 288°C [550.4°F], minimum
A. Unetched Pass Visual Pass Visual rating 2.4.13.1 3.10.1.2
B. Etched Pass Visual Pass Visual
12. Electric Strength, minimum 3.11.1.7
30 – kV/mm 2.5.6.2
(Laminate & prepreg as laminated) 3.11.2.3
13. Flammability 3.10.2.1
V-1 minimum V-1 minimum rating UL94
(Laminate & prepreg as laminated) 3.10.1.1
14. Other – –
PREPREG REQUIREMENTS
Prepreg Requirement Specification Units Test Method Ref. Para.
1. Shelf Life, minimum (Condition 1/Condition 2) 180/90 Days AABUS 3.17
2. Reinforcement As per IPC-4412 or AABUS.
3. Volatile content maximum 0.5 % 2.3.19 3.9.2.2.8
4. Prepreg Parameters – AABUS AABUS 1.1.7
5. Flammability (as laminated) V-1 minimum rating UL94 3.10.2.1
6. Other –
*AABUS = As agreed upon between user and supplier.

44
December 2001 IPC-4101A

Revision Date: December 2001

SPECIFICATION SHEET
SPECIFICATION SHEET #: IPC-4101/27
REINFORCEMENT: 1: Unidirectional E-glass, cross plied 2: N/A
RESIN SYSTEM: Primary: Epoxy
Secondary 1: Multifunctional epoxy Secondary 2: N/A
FLAME RETARDANT MECHANISM: Bromine
FILLERS: N/A
ID REFERENCE: UL/ANSI: N/A MIL-S-13949: N/A
ANSI: 4101/27
GLASS TRANSITION (Tg): 110°C minimum
LAMINATE REQUIREMENTS
Specification Specification
<0.50 mm ≥0.50 mm
Laminate Requirement [0.0197 in] [0.0197 in] Units Test Method Ref. Para.
1. Peel Strength, minimum 3.9.1.1
A. Low profile copper foil and very low profile
copper foil – all copper foil >17µm [0.669 mil]. 0.70 [4.00] 0.70 [4.00]
2.4.8
B. Standard profile copper foil
N/mm [lb/in] 2.4.8.2
1. After thermal stress 0.80 [4.57] 1.05 [6.00] 3.9.1.1.1
2.4.8.3
2. At 125°C [257°F] 0.70 [4.00] 0.70 [4.00] 3.9.1.1.2
3. After process solutions 0.55 [3.14] 0.80 [4.57] 3.9.1.1.3
C. All other foil – composite AABUS AABUS
2. Volume Resistivity, minimum
A. C-96/35/90 106 –
MΩ–cm 2.5.17.1 3.11.1.3
B. After moisture resistance – 106
C. At elevated temperature E-24/125 103 103
3. Surface Resistivity, minimum
A. C-96/35/90 104 –
MΩ 2.5.17.1 3.11.1.4
B. After moisture resistance – 104
C. At elevated temperature E-24/125 103 103
4. Moisture Absorption, maximum – 0.80 % 2.6.2.1 3.12.1.1
5. Dielectric Breakdown, minimum – 40 kV 2.5.6 3.11.1.6
6. Permittivity at 1 MHz, maximum 2.5.5.2
3.11.1.1
(Laminate & prepreg as laminated) 5.4 5.4 – 2.5.5.3
3.11.2.1
2.5.5.9
7. Loss Tangent at 1 MHz, maximum 2.5.5.2
3.11.1.2
(Laminate & prepreg as laminated) 0.035 0.030 – 2.5.5.3
3.11.2.2
2.5.5.9
8. Flexural Strength, minimum
A. Length direction – 294 [42,640] N/mm2 [lb/in2] 2.4.4 3.9.1.3
B. Cross direction – 294 [42,640]
9. Flexural Strength at Elevated Temperature, length
– – N/mm2 [lb/in2] 2.4.4.1 3.9.1.4
direction, minimum
10. Arc Resistance, minimum 60 60 s 2.5.1 3.11.1.5
11. Thermal Stress 10 s at 288°C [550.4°F], minimum
A. Unetched Pass Visual Pass Visual rating 2.4.13.1 3.10.1.2
B. Etched Pass Visual Pass Visual
12. Electric Strength, minimum 3.11.1.7
30 – kV/mm 2.5.6.2
(Laminate & prepreg as laminated) 3.11.2.3
13. Flammability 3.10.2.1
V-1 minimum V-1 minimum rating UL94
(Laminate & prepreg as laminated) 3.10.1.1
14. Other – –
PREPREG REQUIREMENTS
Prepreg Requirement Specification Units Test Method Ref. Para.
1. Shelf Life, minimum (Condition 1/Condition 2) – Days AABUS 3.17
2. Reinforcement As per IPC-4412 or AABUS.
3. Volatile content maximum – % 2.3.19 3.9.2.2.8
4. Prepreg Parameters – AABUS AABUS 1.1.7
5. Flammability (as laminated) V-1 minimum rating UL94 3.10.2.1
6. Other –
*AABUS = As agreed upon between user and supplier.

45
IPC-4101A December 2001

Revision Date: December 2001

SPECIFICATION SHEET
SPECIFICATION SHEET #: IPC-4101/28
REINFORCEMENT: 1: Woven E-glass 2: N/A
RESIN SYSTEM: Primary: Epoxy
Secondary 1: (Non-epoxy) Secondary 2: (Non-epoxy)
FLAME RETARDANT MECHANISM: Bromine
FILLERS: N/A
ID REFERENCE: UL/ANSI: N/A MIL-S-13949: /04 - GFN, GFT
ANSI: 4101/28
GLASS TRANSITION (Tg): 170°C - 220°C
LAMINATE REQUIREMENTS
Specification Specification
<0.50 mm ≥0.50 mm
Laminate Requirement [0.0197 in] [0.0197 in] Units Test Method Ref. Para.
1. Peel Strength, minimum 3.9.1.1
A. Low profile copper foil and very low profile
copper foil – all copper foil >17µm [0.669 mil]. 0.70 [4.00] 0.70 [4.00]
2.4.8
B. Standard profile copper foil
N/mm [lb/in] 2.4.8.2
1. After thermal stress 0.80 [4.57] 1.05 [6.00] 3.9.1.1.1
2.4.8.3
2. At 125°C [257°F] 0.70 [4.00] 0.70 [4.00] 3.9.1.1.2
3. After process solutions 0.55 [3.14] 0.80 [4.57] 3.9.1.1.3
C. All other foil – composite AABUS AABUS
2. Volume Resistivity, minimum
A. After humidity conditioning 106 106 MΩ–cm 2.5.17.1 3.11.1.3
B. At elevated temperature 103 103
3. Surface Resistivity, minimum
A. After humidity conditioning 104 104 MΩ 2.5.17.1 3.11.1.4
B. At elevated temperature 103 103
4. Moisture Absorption, maximum – 0.80 % 2.6.2.1 3.12.1.1
5. Dielectric Breakdown, minimum – 40 kV 2.5.6 3.11.1.6
6. Permittivity at 1 MHz, maximum 2.5.5.2
3.11.1.1
(Laminate & prepreg as laminated) 5.4 5.4 – 2.5.5.3
3.11.2.1
2.5.5.9
7. Loss Tangent at 1 MHz, maximum 2.5.5.2
3.11.1.2
(Laminate & prepreg as laminated) 0.035 0.030 – 2.5.5.3
3.11.2.2
2.5.5.9
8. Flexural Strength, minimum
A. Length direction – 415 [60,190] N/mm2 [lb/in2] 2.4.4 3.9.1.3
B. Cross direction – 345 [50,040]
9. Flexural Strength at Elevated Temperature, length
– – N/mm2 [lb/in2] 2.4.4.1 3.9.1.4
direction, minimum
10. Arc Resistance, minimum 60 60 s 2.5.1 3.11.1.5
11. Thermal Stress 10 s at 288°C [550.4°F], minimum
A. Unetched Pass Visual Pass Visual rating 2.4.13.1 3.10.1.2
B. Etched Pass Visual Pass Visual
12. Electric Strength, minimum 3.11.1.7
30 – kV/mm 2.5.6.2
(Laminate & prepreg as laminated) 3.11.2.3
13. Flammability 3.10.2.1
V-1 minimum V-1 minimum rating UL94
(Laminate & prepreg as laminated) 3.10.1.1
14. Other – –
PREPREG REQUIREMENTS
Prepreg Requirement Specification Units Test Method Ref. Para.
1. Shelf Life, minimum (Condition 1/Condition 2) 180/90 Days AABUS 3.17
2. Reinforcement As per IPC-4412 or AABUS.
3. Volatile content maximum 0.5 % 2.3.19 3.9.2.2.8
4. Prepreg Parameters – AABUS AABUS 1.1.7
5. Flammability (as laminated) V-1 minimum rating UL94 3.10.2.1
6. Other –
*AABUS = As agreed upon between user and supplier.

46
December 2001 IPC-4101A

Revision Date: December 2001

SPECIFICATION SHEET
SPECIFICATION SHEET #: IPC-4101/29
REINFORCEMENT: 1: Woven E-glass 2: N/A
RESIN SYSTEM: Primary: Epoxy
Secondary 1: Triazine Secondary 2: N/A
FLAME RETARDANT MECHANISM: Bromine
FILLERS: N/A
ID REFERENCE: UL/ANSI: N/A MIL-S-13949: /04 - GFN, GFT
ANSI: 4101/29
GLASS TRANSITION (Tg): 170°C - 220°C
LAMINATE REQUIREMENTS
Specification Specification
<0.50 mm ≥0.50 mm
Laminate Requirement [0.0197 in] [0.0197 in] Units Test Method Ref. Para.
1. Peel Strength, minimum 3.9.1.1
A. Low profile copper foil and very low profile
copper foil – all copper weights >17 microns. 0.70 [4.00] 0.70 [4.00]
2.4.8
B. Standard profile copper foil
N/mm [lb/in] 2.4.8.2
1. After Thermal Stress 0.80 [4.57] 1.05 [6.00] 3.9.1.1.1
2.4.8.3
2. At 125°C 0.70 [4.00] 0.70 [4.00] 3.9.1.1.2
3. After Process Solutions 0.55 [3.14] 0.80 [4.57] 3.9.1.1.3
C. All other foil – composite AABUS AABUS
2. Volume Resistivity, minimum
A. C-96/35/90 106 –
MΩ–cm 2.5.17.1 3.11.1.3
B. After moisture resistance – 106
C. At elevated temperature E-24/125 103 103
3. Surface Resistivity, minimum
A. C-96/35/90 104 –
MΩ 2.5.17.1 3.11.1.4
B. After moisture resistance – 104
C. At elevated temperature E-24/125 103 103
4. Moisture Absorption, maximum – 0.80 % 2.6.2.1 3.12.1.1
5. Dielectric Breakdown, minimum – 40 kV 2.5.6 3.11.1.6
6. Permittivity at 1 MHz, maximum 2.5.5.2
3.11.1.1
(Laminate & Prepreg as laminated) 4.4 4.4 – 2.5.5.3
3.11.2.1
2.5.5.9
7. Loss Tangent at 1 MHz, maximum 2.5.5.2
3.11.1.2
(Laminate & Prepreg as laminated) 0.015 0.015 – 2.5.5.3
3.11.2.2
2.5.5.9
8. Flexural Strength, minimum
A. Length direction – 415 [60,190] N/mm2 [lb/in2] 2.4.4 3.9.1.3
B. Cross direction – 345 [50,040]
9. Flexural Strength at Elevated Temperature, length
– – N/mm2 [lb/in2] 2.4.4.1 3.9.1.4
direction, minimum
10. Arc Resistance, minimum 60 60 s 2.5.1 3.11.1.5
11. Thermal Stress 10 Sec at 288°C [550.4°F],
minimum
Pass Visual Pass Visual rating 2.4.13.1 3.10.1.2
A. Unetched
Pass Visual Pass Visual
B. Etched
12. Electric Strength, minimum 3.11.1.7
30 – kV/mm 2.5.6.2
(Laminate & Prepreg as laminated) 3.11.2.3
13. Flammability 3.10.2.1
V-1 minimum V-1 minimum rating UL94
(Laminate & Prepreg as laminated) 3.10.1.1
14. Other – –
PREPREG REQUIREMENTS
Prepreg Requirement Specification Units Test Method Ref. Para.
1. Shelf Life, maximum
180/90 Days AABUS 3.17
(Condition 1/Condition 2)
2. Reinforcement As per IPC-EG-140
3. Volatile content maximum 2.2 % 2.3.19 3.9.2.2.8
4. Prepreg Parameters – AABUS AABUS 1.1.7
5. Flammability (as laminated) V-1 minimum rating UL94 3.10.2.1
6. Other –
*AABUS = As agreed upon between user and supplier.

47
IPC-4101A December 2001

Revision Date: December 2001

SPECIFICATION SHEET
SPECIFICATION SHEET #: IPC-4101/30
REINFORCEMENT: 1: Woven E-glass 2: N/A
RESIN SYSTEM: Primary: Bismaleimide/Triazine (BT)
Secondary 1: Epoxy Secondary 2: N/A
FLAME RETARDANT MECHANISM: Bromine Minimum UL94 Requirement: HB
FILLERS: N/A
ID REFERENCE: UL/ANSI: GPY MIL-S-13949: /26 - GIT
ANSI: GPY/30
GLASS TRANSITION (Tg): 170°C - 220°C
LAMINATE REQUIREMENTS
Specification Specification
<0.50 mm ≥0.50 mm
Laminate Requirement [0.0197 in] [0.0197 in] Units Test Method Ref. Para.
1. Peel Strength, minimum 3.9.1.1
A. Low profile copper foil and very low profile
copper foil – all copper foil >17µm [0.669 mil]. 0.55 [3.14] 0.55 [3.14]
2.4.8
B. Standard profile copper foil
N/mm [lb/in] 2.4.8.2
1. After thermal stress 0.90 [5.14] 0.90 [5.14] 3.9.1.1.1
2.4.8.3
2. At 150°C [302°F] 0.35 [2.00] 0.35 [2.00] 3.9.1.1.2
3. After process solutions 0.70 [4.00] 0.70 [4.00] 3.9.1.1.3
C. All other foil – composite AABUS AABUS
2. Volume Resistivity, minimum
A. C-96/35/90 106 –
MΩ–cm 2.5.17.1 3.11.1.3
B. After moisture resistance – 106
C. At elevated temperature E-24/125 103 103
3. Surface Resistivity, minimum
A. C-96/35/90 106 –
MΩ 2.5.17.1 3.11.1.4
B. After moisture resistance – 106
C. At elevated temperature E-24/125 105 105
4. Moisture Absorption, maximum – 0.35 % 2.6.2.1 3.12.1.1
5. Dielectric Breakdown, minimum – 40 kV 2.5.6 3.11.1.6
6. Permittivity at 1 MHz, maximum 2.5.5.2
3.11.1.1
(Laminate & prepreg as laminated) 4.8 4.8 – 2.5.5.3
3.11.2.1
2.5.5.9
7. Loss Tangent at 1 MHz, maximum 2.5.5.2
3.11.1.2
(Laminate & prepreg as laminated) 0.020 0.020 – 2.5.5.3
3.11.2.2
2.5.5.9
8. Flexural Strength, minimum
A. Length direction – 369 [53,520] N/mm2 [lb/in2] 2.4.4 3.9.1.3
B. Cross direction – 325 [47,140]
9. Flexural Strength at Elevated Temperature,
– 207 [30,020] N/mm2 [lb/in2] 2.4.4.1 3.9.1.4
E1/150, length direction, minimum
10. Arc Resistance, minimum 60 60 s 2.5.1 3.11.1.5
11. Thermal Stress 10 s at 288°C [550.4°F], minimum
A. Unetched Pass Visual Pass Visual rating 2.4.13.1 3.10.1.2
B. Etched Pass Visual Pass Visual
12. Electric Strength, minimum 3.11.1.7
30 – kV/mm 2.5.6.2
(Laminate & prepreg as laminated) 3.11.2.3
13. Flammability** 3.10.2.1
HB HB rating UL94
(Laminate & prepreg as laminated) 3.10.1.1
14. Other – –
PREPREG REQUIREMENTS
Prepreg Requirement Specification Units Test Method Ref. Para.
1. Shelf Life, minimum (Condition 1/Condition 2) 180/90 Days AABUS 3.17
2. Reinforcement As per IPC-4412 or AABUS.
3. Volatile content maximum 2.0 % 2.3.19 3.9.2.2.8
4. Prepreg Parameters – AABUS AABUS 1.1.7
5. Flammability** (as laminated) HB rating UL94 3.10.2.1
6. Other –
*AABUS = As agreed upon between user and supplier.
**Tested for qualification as a minimum requirement. Conformance testing AABUS.

48
December 2001 IPC-4101A

Revision Date: December 2001

SPECIFICATION SHEET
SPECIFICATION SHEET #: IPC-4101/40
REINFORCEMENT: 1: Woven E-glass 2: N/A
RESIN SYSTEM: Primary: Polyimide
Secondary 1: N/A Secondary 2: N/A
FLAME RETARDANT MECHANISM: N/A Minimum UL94 Requirement: HB
FILLERS: With or without inorganic fillers
ID REFERENCE: UL/ANSI: GPY MIL-S-13949: /10 - GI, GIN, GIJ, GIP, GIL
ANSI: GPY/40
GLASS TRANSITION (Tg): 200°C minimum
LAMINATE REQUIREMENTS
Specification Specification
<0.50 mm ≥0.50 mm
Laminate Requirement [0.0197 in] [0.0197 in] Units Test Method Ref. Para.
1. Peel Strength, minimum 3.9.1.1
A. Low profile copper foil and very low profile
copper foil – all copper foil >17µm [0.669 mil]. AABUS AABUS
2.4.8
B. Standard profile copper foil N/mm
2.4.8.2
1. After thermal stress 0.90 [5.14] 0.90 [5.14] [lb/in] 3.9.1.1.1
2.4.8.3
2. At 125°C [257°F] 0.70 [4.00] 0.70 [4.00] 3.9.1.1.2
3. After process solutions 0.80 [4.57] 0.95 [5.42] 3.9.1.1.3
C. All other foil – composite – –
2. Volume Resistivity, minimum
A. After humidity conditioning 6 x 104 106 MΩ–cm 2.5.17.1 3.11.1.3
B. At elevated temperature (204°C [399.2°F]) 6 x 104 106
3. Surface Resistivity, minimum
A. After humidity conditioning 104 106 MΩ 2.5.17.1 3.11.1.4
B. At elevated temperature (204°C [399.2°F]) 104 106
4. Moisture Absorption, maximum 0.50 ≤ t <1.55 mm
1.0
% 2.6.2.1 3.12.1.1
– 1.55 ≤ t ≤ 6.35 mm
0.5
5. Dielectric Breakdown, minimum – 40 kV 2.5.6 3.11.1.6
6. Permittivity at 1 MHz, maximum 2.5.5.2
3.11.1.1
(Laminate & prepreg as laminated) 5.4 5.4 – 2.5.5.3
3.11.2.1
2.5.5.9
7. Loss Tangent at 1 MHz, maximum 2.5.5.2
3.11.1.2
(Laminate & prepreg as laminated) 0.035 0.035 – 2.5.5.3
3.11.2.2
2.5.5.9
8. Flexural Strength, minimum
N/mm2
A. Length direction – 415 [60,190] 2.4.4 3.9.1.3
[lb/in2]
B. Cross direction – 325 [47,140]
9. Flexural Strength at Elevated Temperature, N/mm2
– 311 [45,110] 2.4.4.1 3.9.1.4
E1/204, length direction, minimum [lb/in2]
10. Arc Resistance, minimum 120 120 s 2.5.1 3.11.1.5
11. Thermal Stress 10 s at 288°C [550.4°F], minimum
A. Unetched Pass Visual Pass Visual rating 2.4.13.1 3.10.1.2
B. Etched Pass Visual Pass Visual
12. Electric Strength, minimum 3.11.1.7
30 – kV/mm 2.5.6.2
(Laminate & prepreg as laminated) 3.11.2.3
13. Flammability** 3.10.2.1
HB HB rating UL94
(Laminate & prepreg as laminated) 3.10.1.1
14. Other – –
PREPREG REQUIREMENTS
Prepreg Requirement Specification Units Test Method Ref. Para.
1. Shelf Life, minimum (Condition 1/Condition 2) 180/90 Days AABUS 3.17
2. Reinforcement As per IPC-4412 or AABUS.
3. Volatile content maximum 4.0 % 2.3.19 3.9.2.2.8
4. Prepreg Parameters – AABUS AABUS 1.1.7
5. Flammability** (as laminated) HB rating UL94 3.10.2.1
6. Other –
*AABUS = As agreed upon between user and supplier.
**Tested for qualification as a minimum requirement. Conformance testing AABUS.

49
IPC-4101A December 2001

Revision Date: December 2001

SPECIFICATION SHEET
SPECIFICATION SHEET #: IPC-4101/41
REINFORCEMENT: 1: Woven E-glass 2: N/A
RESIN SYSTEM: Primary: Polyimide
Secondary 1: N/A Secondary 2: N/A
FLAME RETARDANT MECHANISM: N/A Minimum UL94 Requirement: HB
FILLERS: With or without inorganic fillers
ID REFERENCE: UL/ANSI: GPY MIL-S-13949: /10 - GIL, GIP
ANSI: GPY/41
GLASS TRANSITION (Tg): 250°C minimum
LAMINATE REQUIREMENTS
Specification Specification
<0.50 mm ≥0.50 mm
Laminate Requirement [0.0197 in] [0.0197 in] Units Test Method Ref. Para.
1. Peel Strength, minimum 3.9.1.1
A. Low profile copper foil and very low profile
copper foil – all copper foil >17µm [0.669 mil]. AABUS AABUS
2.4.8
B. Standard profile copper foil N/mm
2.4.8.2
1. After thermal stress 0.70 [4.00] 0.80 [4.57] [lb/in] 3.9.1.1.1
2.4.8.3
2. At 125°C [257°F] 0.60 [3.43] 0.70 [4.00] 3.9.1.1.2
3. After process solutions 0.60 [3.43] 0.70 [4.00] 3.9.1.1.3
C. All other foil – composite – –
2. Volume Resistivity, minimum
A. After humidity conditioning 6 x 104 106 MΩ–cm 2.5.17.1 3.11.1.3
B. At elevated temperature (204°C [399.2°F]) 6 x 104 106
3. Surface Resistivity, minimum
A. After humidity conditioning 104 106 MΩ 2.5.17.1 3.11.1.4
B. At elevated temperature (204°C [399.2°F]) 104 106
4. Moisture Absorption, maximum 0.50 ≤ t <1.55 mm
1.0
% 2.6.2.1 3.12.1.1
– 1.55 ≤ t ≤ 6.35 mm
0.5
5. Dielectric Breakdown, minimum – 40 kV 2.5.6 3.11.1.6
6. Permittivity at 1 MHz, maximum 2.5.5.2
3.11.1.1
(Laminate & prepreg as laminated) 5.4 5.4 – 2.5.5.3
3.11.2.1
2.5.5.9
7. Loss Tangent at 1 MHz, maximum 2.5.5.2
3.11.1.2
(Laminate & prepreg as laminated) 0.035 0.035 – 2.5.5.3
3.11.2.2
2.5.5.9
8. Flexural Strength, minimum
N/mm2
A. Length direction – 415 [60,190] 2.4.4 3.9.1.3
[lb/in2]
B. Cross direction – 325 [47,140]
9. Flexural Strength at Elevated Temperature, N/mm2
– 311 [45,110] 2.4.4.1 3.9.1.4
E1/204, length direction, minimum [lb/in2]
10. Arc Resistance, minimum 120 120 s 2.5.1 3.11.1.5
11. Thermal Stress 10 s at 288°C [550.4°F], minimum
A. Unetched Pass Visual Pass Visual rating 2.4.13.1 3.10.1.2
B. Etched Pass Visual Pass Visual
12. Electric Strength, minimum 3.11.1.7
30 – kV/mm 2.5.6.2
(Laminate & prepreg as laminated) 3.11.2.3
13. Flammability** 3.10.2.1
HB HB rating UL94
(Laminate & prepreg as laminated) 3.10.1.1
14. Other – –
PREPREG REQUIREMENTS
Prepreg Requirement Specification Units Test Method Ref. Para.
1. Shelf Life, minimum (Condition 1/Condition 2) 180/90 Days AABUS 3.17
2. Reinforcement As per IPC-4412 or AABUS.
3. Volatile content maximum 4.0 % 2.3.19 3.9.2.2.8
4. Prepreg Parameters – AABUS AABUS 1.1.7
5. Flammability** (as laminated) HB rating UL94 3.10.2.1
6. Other –
*AABUS = As agreed upon between user and supplier.
**Tested for qualification as a minimum requirement. Conformance testing AABUS.

50
December 2001 IPC-4101A

Revision Date: December 2001

SPECIFICATION SHEET
SPECIFICATION SHEET #: IPC-4101/42
REINFORCEMENT: 1: Woven E-glass 2: None
RESIN SYSTEM: Primary: Polyimide
Secondary 1: Epoxy Secondary 2: None
FLAME RETARDANT MECHANISM: N/A Minimum UL94 Requirement: HB
FILLERS: With or without inorganic fillers
ID REFERENCE: UL/ANSI: GPY MIL-S-13949: /10 - GIJ
ANSI: GPY/42
GLASS TRANSITION (Tg): 200°C - 250°C
LAMINATE REQUIREMENTS
Specification Specification
<0.50 mm ≥0.50 mm
Laminate Requirement [0.0197 in] [0.0197 in] Units Test Method Ref. Para.
1. Peel Strength, minimum 3.9.1.1
A. Low profile copper foil and very low profile
copper foil – all copper foil >17µm [0.669 mil]. AABUS AABUS
2.4.8
B. Standard profile copper foil N/mm
2.4.8.2
1. After thermal stress 0.90 [5.14] 0.90 [5.14] [lb/in] 3.9.1.1.1
2.4.8.3
2. At 170°C [338°F] 0.70 [4.00] 0.70 [4.00] 3.9.1.1.2
3. After process solutions 0.80 [4.57] 0.95 [5.42] 3.9.1.1.3
C. All other foil – composite AABUS AABUS
2. Volume Resistivity, minimum
A. After humidity conditioning 6 x 104 106 MΩ–cm 2.5.17.1 3.11.1.3
B. At elevated temperature (204°C [399.2°F]) 6 x 104 106
3. Surface Resistivity, minimum
A. After humidity conditioning 104 106 MΩ 2.5.17.1 3.11.1.4
B. At elevated temperature (204°C [399.2°F]) 104 106
4. Moisture Absorption, maximum 0.50 ≤ t <1.55 mm
1.0
% 2.6.2.1 3.12.1.1
– 1.55 ≤ t ≤ 6.35 mm
0.5
5. Dielectric Breakdown, minimum – 40 kV 2.5.6 3.11.1.6
6. Permittivity at 1 MHz, maximum 2.5.5.2
3.11.1.1
(Laminate & prepreg as laminated) 5.4 5.4 – 2.5.5.3
3.11.2.1
2.5.5.9
7. Loss Tangent at 1 MHz, maximum 2.5.5.2
3.11.1.2
(Laminate & prepreg as laminated) 0.035 0.035 – 2.5.5.3
3.11.2.2
2.5.5.9
8. Flexural Strength, minimum
N/mm2
A. Length direction – 415 [60,190] 2.4.4 3.9.1.3
[lb/in2]
B. Cross direction – 325 [47,140]
9. Flexural Strength at Elevated Temperature, N/mm2
– 311 [45,110] 2.4.4.1 3.9.1.4
E1/204, length direction, minimum [lb/in2]
10. Arc Resistance, minimum 120 120 s 2.5.1 3.11.1.5
11. Thermal Stress 10 s at 288°C [550.4°F], minimum
A. Unetched Pass Visual Pass Visual rating 2.4.13.1 3.10.1.2
B. Etched Pass Visual Pass Visual
12. Electric Strength, minimum 3.11.1.7
30 – kV/mm 2.5.6.2
(Laminate & prepreg as laminated) 3.11.2.3
13. Flammability** 3.10.2.1
HB HB rating UL94
(Laminate & prepreg as laminated) 3.10.1.1
14. Other – –
PREPREG REQUIREMENTS
Prepreg Requirement Specification Units Test Method Ref. Para.
1. Shelf Life, minimum (Condition 1/Condition 2) 180/90 Days AABUS 3.17
2. Reinforcement As per IPC-4412 or AABUS.
3. Volatile content maximum 4.0 % 2.3.19 3.9.2.2.8
4. Prepreg Parameters – AABUS AABUS 1.1.7
5. Flammability** (as laminated) HB rating UL94 3.10.2.1
6. Other –
*AABUS = As agreed upon between user and supplier.
**Tested for qualification as a minimum requirement. Conformance testing AABUS.

51
IPC-4101A December 2001

Revision Date: December 2001

SPECIFICATION SHEET
SPECIFICATION SHEET #: IPC-4101/50
REINFORCEMENT: 1: Woven aramid 2: None
RESIN SYSTEM: Primary: Epoxy
Secondary 1: Multifunctional epoxy Secondary 2: None
FLAME RETARDANT MECHANISM: Bromine
FILLERS: None
ID REFERENCE: UL/ANSI: N/A MIL-S-13949: /15 - AF, AFN, AFG
ANSI: 4101/50
GLASS TRANSITION (Tg): 150°C - 200°C
LAMINATE REQUIREMENTS
Specification Specification
<0.50 mm ≥0.50 mm
Laminate Requirement [0.0197 in] [0.0197 in] Units Test Method Ref. Para.
1. Peel Strength, minimum 3.9.1.1
A. Low profile copper foil and very low profile copper
foil – all copper foil >17µm [0.669 mil]. AABUS AABUS
2.4.8
B. Standard profile copper foil
N/mm [lb/in] 2.4.8.2
1. After thermal stress 0.70 [4.00] 0.80 [4.57] 3.9.1.1.1
2.4.8.3
2. At 125°C [257°F] 0.60 [3.43] 0.70 [4.00] 3.9.1.1.2
3. After process solutions 0.55 [3.14] 0.70 [4.00] 3.9.1.1.3
C. All other foil – composite AABUS AABUS
2. Volume Resistivity, minimum
A. C-96/35/90 106 106
MΩ–cm 2.5.17.1 3.11.1.3
B. After moisture resistance – –
C. At elevated temperature E-24/125 103 103
3. Surface Resistivity, minimum
A. C-96/35/90 104 104
MΩ 2.5.17.1 3.11.1.4
B. After moisture resistance – –
C. At elevated temperature E-24/125 103 103
4. Moisture Absorption, maximum – 2.0 % 2.6.2.1 3.12.1.1
5. Dielectric Breakdown, minimum – 40 kV 2.5.6 3.11.1.6
6. Permittivity at 1 MHz, maximum 2.5.5.2
3.11.1.1
(Laminate & prepreg as laminated) 4.5 4.5 – 2.5.5.3
3.11.2.1
2.5.5.9
7. Loss Tangent at 1 MHz, maximum 2.5.5.2
3.11.1.2
(Laminate & prepreg as laminated) 0.035 0.035 – 2.5.5.3
3.11.2.2
2.5.5.9
8. Flexural Strength, minimum
A. Length direction – 345 [50,040] N/mm2 [lb/in2] 2.4.4 3.9.1.3
B. Cross direction – 277 [40,180]
9. Flexural Strength at Elevated Temperature, length
– – N/mm2 [lb/in2] 2.4.4.1 3.9.1.4
direction, minimum
10. Arc Resistance, minimum 60 60 s 2.5.1 3.11.1.5
11. Thermal Stress 10 s at 288°C [550.4°F], minimum
A. Unetched Pass Visual Pass Visual rating 2.4.13.1 3.10.1.2
B. Etched Pass Visual Pass Visual
12. Electric Strength, minimum 3.11.1.7
30 – kV/mm 2.5.6.2
(Laminate & prepreg as laminated) 3.11.2.3
13. Flammability 3.10.2.1
V-1 minimum V-1 minimum rating UL94
(Laminate & prepreg as laminated) 3.10.1.1
14. Opaque Foreign Inclusions
≤508 microns as per area, max 16 16 Counts
≤508 microns as per area, max 4 4 Counts
– 3.8.3.1.7
≤508 microns ≤1016 as per area, max 2 2 Counts
>1016 microns as per area, max 0 0 Counts
15. Other – –
PREPREG REQUIREMENTS
Prepreg Requirement Specification Units Test Method Ref. Para.
1. Shelf Life, minimum (Condition 1/Condition 2) 180/90 Days AABUS 3.17
2. Reinforcement As per IPC-4412 or AABUS.
3. Volatile content maximum 0.75 % 2.3.19 3.9.2.2.8
4. Prepreg Parameters – AABUS AABUS 1.1.7
5. Flammability (as laminated) V-1 minimum rating UL94 3.10.2.1
6. Other –
*AABUS = As agreed upon between user and supplier.
52
December 2001 IPC-4101A

Revision Date: December 2001

SPECIFICATION SHEET
SPECIFICATION SHEET #: IPC-4101/53
REINFORCEMENT: 1: Nonwoven aramid paper 2: N/A
RESIN SYSTEM: Primary: Polyimide
Secondary 1: Epoxy Secondary 2: N/A
FLAME RETARDANT MECHANISM: N/A
FILLERS: N/A
ID REFERENCE: UL/ANSI: N/A MIL-S-13949: /31 - BIN, BIL, BIJ
ANSI: 4101/53
GLASS TRANSITION (Tg): 220°C minimum
LAMINATE REQUIREMENTS
Specification Specification
<0.50 mm ≥0.50 mm
Laminate Requirement [0.0197 in] [0.0197 in] Units Test Method Ref. Para.
1. Peel Strength, minimum 3.9.1.1
A. Low profile copper foil and very low profile
copper foil – all copper foil >17µm [0.669 mil]. AABUS AABUS
2.4.8
B. Standard profile copper foil
N/mm [lb/in] 2.4.8.2
1. After thermal stress 0.55 [3.14] 0.55 [3.14] 3.9.1.1.1
2.4.8.3
2. At 125°C [257°F] 0.50 [2.86] 0.50 [2.86] 3.9.1.1.2
3. After process solutions 0.50 [2.86] 0.50 [2.86] 3.9.1.1.3
C. All other foil – composite AABUS AABUS
2. Volume Resistivity, minimum
A. After moisture resistance 106 106 MΩ–cm 2.5.17.1 3.11.1.3
B. At elevated temperature E-24/125 103 103
3. Surface Resistivity, minimum
A. After moisture resistance 104 104 MΩ 2.5.17.1 3.11.1.4
B. At elevated temperature E-24/125 103 103
4. Moisture Absorption, maximum – 3.5 % 2.6.2.1 3.12.1.1
5. Dielectric Breakdown, minimum – 40 kV 2.5.6 3.11.1.6
6. Permittivity at 1 MHz, maximum 2.5.5.2
3.11.1.1
(Laminate & prepreg as laminated) 4.5 4.5 – 2.5.5.3
3.11.2.1
2.5.5.9
7. Loss Tangent at 1 MHz, maximum 2.5.5.2
3.11.1.2
(Laminate & prepreg as laminated) 0.035 0.035 – 2.5.5.3
3.11.2.2
2.5.5.9
8. Flexural Strength, minimum
A. Length direction – 207 [30,020] N/mm2 [lb/in2] 2.4.4 3.9.1.3
B. Cross direction – 207 [30,020]
9. Flexural Strength at Elevated Temperature, length
– – N/mm2 [lb/in2] 2.4.4.1 3.9.1.4
direction, minimum
10. Arc Resistance, minimum 60 60 s 2.5.1 3.11.1.5
11. Thermal Stress 10 s at 288°C [550.4°F], minimum
A. Unetched Pass Visual Pass Visual rating 2.4.13.1 3.10.1.2
B. Etched Pass Visual Pass Visual
12. Electric Strength, minimum 3.11.1.7
30 – kV/mm 2.5.6.2
(Laminate & prepreg as laminated) 3.11.2.3
13. Flammability** 3.10.2.1
HB minimum HB minimum rating UL94
(Laminate & prepreg as laminated) 3.10.1.1
14. Other – –
PREPREG REQUIREMENTS
Prepreg Requirement Specification Units Test Method Ref. Para.
1. Shelf Life, minimum (Condition 1/Condition 2) 180/90 DAYS AABUS 3.17
2. Reinforcement As per IPC-4411 or AABUS.
3. Volatile content maximum 2.5% % 2.3.19 3.9.2.2.8
4. Prepreg Parameters – AABUS AABUS 1.1.7
5. Flammability** (as laminated) HB rating UL94 3.10.2.1
6. Other –
*AABUS = As agreed upon between user and supplier.
**Tested for qualification as a minimum requirement. Conformance testing AABUS.

53
IPC-4101A December 2001

Revision Date: December 2001

SPECIFICATION SHEET
SPECIFICATION SHEET #: IPC-4101/54
REINFORCEMENT: 1: Unidirectional aramid fiber, cross-plied 2: None
RESIN SYSTEM: Primary: Cyanate ester
Secondary 1: None Secondary 2: None
FLAME RETARDANT MECHANISM: Bromine
FILLERS: None
ID REFERENCE: UL/ANSI: N/A MIL-S-13949: N/A
ANSI: 4101/54
GLASS TRANSITION (Tg): 230°C
LAMINATE REQUIREMENTS
Specification Specification
<0.50 mm ≥0.50 mm
Laminate Requirement [0.0197 in] [0.0197 in] Units Test Method Ref. Para.
1. Peel Strength, minimum 3.9.1.1
A. Low profile copper foil and very low profile
copper foil – all copper foil >17µm [0.669 mil]. AABUS AABUS
2.4.8
B. Standard profile copper foil
N/mm [lb/in] 2.4.8.2
1. After thermal stress 0.70 [4.00] 0.70 [4.00] 3.9.1.1.1
2.4.8.3
2. At 170°C [338°F] AABUS AABUS 3.9.1.1.2
3. After process solutions 0.60 [3.43] 0.60 [3.43] 3.9.1.1.3
C. All other foil – composite AABUS AABUS
2. Volume Resistivity, minimum
A. C-96/35/90 6 x 104 6 x 104
MΩ–cm 2.5.17.1 3.11.1.3
B. After moisture resistance – –
C. At elevated temperature E-24/125 103 103
3. Surface Resistivity, minimum
A. C-96/35/90 104 104
MΩ 2.5.17.1 3.11.1.4
B. After moisture resistance – –
C. At elevated temperature E-24/125 103 103
4. Moisture Absorption, maximum – 2.0 % 2.6.2.1 3.12.1.1
5. Dielectric Breakdown, minimum – 40 kV 2.5.6 3.11.1.6
6. Permittivity at 1 MHz, maximum 2.5.5.2
3.11.1.1
(Laminate & prepreg as laminated) 4.2 4.2 – 2.5.5.3
3.11.2.1
2.5.5.9
7. Loss Tangent at 1 MHz, maximum 2.5.5.2
3.11.1.2
(Laminate & prepreg as laminated) 0.025 0.025 – 2.5.5.3
3.11.2.2
2.5.5.9
8. Flexural Strength, minimum
A. Length direction – 345 [50,040] N/mm2 [lb/in2] 2.4.4 3.9.1.3
B. Cross direction – 277 [40,180]
9. Flexural Strength at Elevated Temperature, length
– – N/mm2 [lb/in2] 2.4.4.1 3.9.1.4
direction, minimum
10. Arc Resistance, minimum 60 60 s 2.5.1 3.11.1.5
11. Thermal Stress 10 s at 288°C [550.4°F], minimum
A. Unetched Pass Visual Pass Visual rating 2.4.13.1 3.10.1.2
B. Etched Pass Visual Pass Visual
12. Electric Strength, minimum 3.11.1.7
30 – kV/mm 2.5.6.2
(Laminate & prepreg as laminated) 3.11.2.3
13. Flammability 3.10.2.1
V-1 minimum V-1 minimum rating UL94
(Laminate & prepreg as laminated) 3.10.1.1
14. Other – –
PREPREG REQUIREMENTS
Prepreg Requirement Specification Units Test Method Ref. Para.
1. Shelf Life, minimum (Condition 1/Condition 2) 180/90 Days AABUS 3.17
2. Reinforcement As per IPC-4411 or AABUS.
3. Volatile content maximum 1.5 % 2.3.19 3.9.2.2.8
4. Prepreg Parameters – AABUS AABUS 1.1.7
5. Flammability (as laminated) V-1 minimum rating UL94 3.10.2.1
6. Other –
*AABUS = As agreed upon between user and supplier.

54
December 2001 IPC-4101A

Revision Date: December 2001

SPECIFICATION SHEET
SPECIFICATION SHEET #: IPC-4101/55
REINFORCEMENT: 1: Nonwoven aramid paper 2: None
RESIN SYSTEM: Primary: Epoxy
Secondary 1: Multifunctional epoxy Secondary 2: None
FLAME RETARDANT MECHANISM: Bromine
FILLERS: None
ID REFERENCE: UL/ANSI: N/A MIL-S-13949: /22 - BF, BFN, BFG
ANSI: 4101/55
GLASS TRANSITION (Tg): 150°C to 200°C
LAMINATE REQUIREMENTS
Specification Specification
<0.50 mm ≥0.50 mm
Laminate Requirement [0.0197 in] [0.0197 in] Units Test Method Ref. Para.
1. Peel Strength, minimum 3.9.1.1
A. Low profile copper foil and very low profile
copper foil – all copper foil >17µm [0.669 mil]. AABUS AABUS
2.4.8
B. Standard profile copper foil
N/mm [lb/in] 2.4.8.2
1. After thermal stress 0.55 [3.14] 0.55 [3.14] 3.9.1.1.1
2.4.8.3
2. At 125°C [257°F] 0.50 [2.86] 0.50 [2.86] 3.9.1.1.2
3. After process solutions 0.50 [2.86] 0.50 [2.86] 3.9.1.1.3
C. All other foil – composite AABUS AABUS
2. Volume Resistivity, minimum
A. C-96/35/90 106 106
MΩ–cm 2.5.17.1 3.11.1.3
B. After moisture resistance – –
C. At elevated temperature E-24/125 103 103
3. Surface Resistivity, minimum
A. C-96/35/90 104 104
MΩ 2.5.17.1 3.11.1.4
B. After moisture resistance – –
C. At elevated temperature E-24/125 103 103
4. Moisture Absorption, maximum – 2.0 % 2.6.2.1 3.12.1.1
5. Dielectric Breakdown, minimum – 40 kV 2.5.6 3.11.1.6
6. Permittivity at 1 MHz, maximum 2.5.5.2
3.11.1.1
(Laminate & prepreg as laminated) 4.5 4.5 – 2.5.5.3
3.11.2.1
2.5.5.9
7. Loss Tangent at 1 MHz, maximum 2.5.5.2
3.11.1.2
(Laminate & prepreg as laminated) 0.035 0.035 – 2.5.5.3
3.11.2.2
2.5.5.9
8. Flexural Strength, minimum
A. Length direction – 277 [40,180] N/mm2 [lb/in2] 2.4.4 3.9.1.3
B. Cross direction – 277 [40,180]
9. Flexural Strength at Elevated Temperature, length
– – N/mm2 [lb/in2] 2.4.4.1 3.9.1.4
direction, minimum
10. Arc Resistance, minimum 60 60 s 2.5.1 3.11.1.5
11. Thermal Stress 10 s at 288°C [550.4°F], minimum
A. Unetched Pass Visual Pass Visual rating 2.4.13.1 3.10.1.2
B. Etched Pass Visual Pass Visual
12. Electric Strength, minimum 3.11.1.7
30 – kV/mm 2.5.6.2
(Laminate & prepreg as laminated) 3.11.2.3
13. Flammability 3.10.2.1
V-1 minimum V-1 minimum rating UL94
(Laminate & prepreg as laminated) 3.10.1.1
14. Other – –
PREPREG REQUIREMENTS
Prepreg Requirement Specification Units Test Method Ref. Para.
1. Shelf Life, minimum (Condition 1/Condition 2) 180/90 DAYS AABUS 3.17
2. Reinforcement As per IPC-4411 or AABUS.
3. Volatile content maximum 1.5 % 2.3.19 3.9.2.2.8
4. Prepreg Parameters – AABUS AABUS 1.1.7
5. Flammability (as laminated) V-1 minimum rating UL94 3.10.2.1
6. Other –
*AABUS = As agreed upon between user and supplier.

55
IPC-4101A December 2001

Revision Date: December 2001

SPECIFICATION SHEET
SPECIFICATION SHEET #: IPC-4101/56
REINFORCEMENT: 1: Nonwoven aramid paper 2: N/A
RESIN SYSTEM: Primary: Polyimide
Secondary 1: N/A Secondary 2: N/A
FLAME RETARDANT MECHANISM: N/A
FILLERS: N/A
ID REFERENCE: UL/ANSI: N/A MIL-S-13949: /31 - BIL
ANSI: 4101/56
GLASS TRANSITION (Tg): 250°C minimum
LAMINATE REQUIREMENTS
Specification Specification
<0.50 mm ≥0.50 mm
Laminate Requirement [0.0197 in] [0.0197 in] Units Test Method Ref. Para.
1. Peel Strength, minimum 3.9.1.1
A. Low profile copper foil and very low profile
copper foil – all copper foil >17µm [0.669 mil]. AABUS AABUS
2.4.8
B. Standard profile copper foil
N/mm [lb/in] 2.4.8.2
1. After thermal stress 0.55 [3.14] 0.55 [3.14] 3.9.1.1.1
2.4.8.3
2. At 125°C [257°F] 0.50 [2.86] 0.50 [2.86] 3.9.1.1.2
3. After process solutions 0.50 [2.86] 0.50 [2.86] 3.9.1.1.3
C. All other foil – composite AABUS AABUS
2. Volume Resistivity, minimum
A. After moisture resistance 106 106 MΩ–cm 2.5.17.1 3.11.1.3
B. At elevated temperature E-24/125 103 103
3. Surface Resistivity, minimum
A. After moisture resistance 104 104 MΩ 2.5.17.1 3.11.1.4
B. At elevated temperature E-24/125 103 103
4. Moisture Absorption, maximum – 3.5 % 2.6.2.1 3.12.1.1
5. Dielectric Breakdown, minimum – 40 kV 2.5.6 3.11.1.6
6. Permittivity at 1 MHz, maximum 2.5.5.2
3.11.1.1
(Laminate & prepreg as laminated) 4.5 4.5 – 2.5.5.3
3.11.2.1
2.5.5.9
7. Loss Tangent at 1 MHz, maximum 2.5.5.2
3.11.1.2
(Laminate & prepreg as laminated) 0.035 0.035 – 2.5.5.3
3.11.2.2
2.5.5.9
8. Flexural Strength, minimum
A. Length direction – 207 [30,020] N/mm2 [lb/in2] 2.4.4 3.9.1.3
B. Cross direction – 207 [30,020]
9. Flexural Strength at Elevated Temperature, length
– – N/mm2 [lb/in2] 2.4.4.1 3.9.1.4
direction, minimum
10. Arc Resistance, minimum 60 60 s 2.5.1 3.11.1.5
11. Thermal Stress 10 s at 288°C [550.4°F], minimum
A. Unetched Pass Visual Pass Visual rating 2.4.13.1 3.10.1.2
B. Etched Pass Visual Pass Visual
12. Electric Strength, minimum 3.11.1.7
30 – kV/mm 2.5.6.2
(Laminate & prepreg as laminated) 3.11.2.3
13. Flammability** 3.10.2.1
HB minimum HB minimum rating UL94
(Laminate & prepreg as laminated) 3.10.1.1
14. Other – –
PREPREG REQUIREMENTS
Prepreg Requirement Specification Units Test Method Ref. Para.
1. Shelf Life, minimum (Condition 1/Condition 2) 180/90 Days AABUS 3.17
2. Reinforcement As per IPC-4411 or AABUS.
3. Volatile content maximum 2.5% % 2.3.19 3.9.2.2.8
4. Prepreg Parameters – AABUS AABUS 1.1.7
5. Flammability** (as laminated) HB rating UL94 3.10.2.1
6. Other –
*AABUS = As agreed upon between user and supplier.
**Tested for qualification as a minimum requirement. Conformance testing AABUS.

56
December 2001 IPC-4101A

Revision Date: December 2001

SPECIFICATION SHEET
SPECIFICATION SHEET #: IPC-4101/60
REINFORCEMENT: 1: Woven quartz fiber 2: N/A
RESIN SYSTEM: Primary: Polyimide
Secondary 1: N/A Secondary 2: N/A
FLAME RETARDANT MECHANISM: Bromine (if applicable)
FILLERS: N/A
ID REFERENCE: UL/ANSI: N/A MIL-S-13949: /19 - QIL
ANSI: 4101/60
GLASS TRANSITION (Tg): 250°C minimum
LAMINATE REQUIREMENTS
Specification Specification
<0.50 mm ≥0.50 mm
Laminate Requirement [0.0197 in] [0.0197 in] Units Test Method Ref. Para.
1. Peel Strength, minimum 3.9.1.1
A. Low profile copper foil and very low profile
copper foil – all copper foil >17µm [0.669 mil]. AABUS AABUS
2.4.8
B. Standard profile copper foil
N/mm [lb/in] 2.4.8.2
1. After thermal stress 0.90 [5.14] 1.05 [6.00] 3.9.1.1.1
2.4.8.3
2. At 125°C [257°F] 0.70 [4.00] 0.70 [4.00] 3.9.1.1.2
3. After process solutions 0.80 [4.57] 0.95 [5.42] 3.9.1.1.3
C. All other foil – composite AABUS AABUS
2. Volume Resistivity, minimum
A. C-96/35/90 6 x 104 –
MΩ–cm 2.5.17.1 3.11.1.3
B. After moisture resistance – 106
C. At elevated temperature E-24/125 6 x 104 106
3. Surface Resistivity, minimum
A. C-96/35/90 104 –
MΩ 2.5.17.1 3.11.1.4
B. After moisture resistance – 106
C. At elevated temperature E-24/125 6 x 104 106
4. Moisture Absorption, maximum – 1.0 % 2.6.2.1 3.12.1.1
5. Dielectric Breakdown, minimum – 40 kV 2.5.6 3.11.1.6
6. Permittivity at 1 MHz, maximum 2.5.5.2
3.11.1.1
(Laminate & prepreg as laminated) 3.4 3.8 – 2.5.5.3
3.11.2.1
2.5.5.9
7. Loss Tangent at 1 MHz, maximum 2.5.5.2
3.11.1.2
(Laminate & prepreg as laminated) 0.010 0.010 – 2.5.5.3
3.11.2.2
2.5.5.9
8. Flexural Strength, minimum
A. Length direction – 415 [60,190] N/mm2 [lb/in2] 2.4.4 3.9.1.3
B. Cross direction – 311 [45,110]
9. Flexural Strength at Elevated Temperature 204°C,
– 311 [45,110] N/mm2 [lb/in2] 2.4.4.1 3.9.1.4
length direction, minimum
10. Arc Resistance, minimum 120 120 s 2.5.1 3.11.1.5
11. Thermal Stress 10 s at 288°C [550.4°F], minimum
A. Unetched Pass Visual Pass Visual rating 2.4.13.1 3.10.1.2
B. Etched Pass Visual Pass Visual
12. Electric Strength, minimum 3.11.1.7
30 – kV/mm 2.5.6.2
(Laminate & prepreg as laminated) 3.11.2.3
13. Flammability** 3.10.2.1
HB minimum HB minimum rating UL94
(Laminate & prepreg as laminated) 3.10.1.1
14. Other – –
PREPREG REQUIREMENTS
Prepreg Requirement Specification Units Test Method Ref. Para.
1. Shelf Life, minimum (Condition 1/Condition 2) 180/90 Days AABUS 3.17
2. Reinforcement As per IPC-QF-143 or AABUS.
3. Volatile content maximum 1.5 % 2.3.19 3.9.2.2.8
4. Prepreg Parameters – AABUS AABUS 1.1.7
5. Flammability** (as laminated) HB rating UL94 3.10.2.1
6. Other –
*AABUS = As agreed upon between user and supplier.
**Tested for qualification as a minimum requirement. Conformance testing AABUS.

57
IPC-4101A December 2001

Revision Date: December 2001

SPECIFICATION SHEET
SPECIFICATION SHEET #: IPC-4101/70
REINFORCEMENT: 1: Woven S-2 glass 2: N/A
RESIN SYSTEM: Primary: Cyanate ester
Secondary 1: N/A Secondary 2: N/A
FLAME RETARDANT MECHANISM: Bromine
FILLERS: N/A
ID REFERENCE: UL/ANSI: N/A MIL-S-13949: N/A
ANSI: 4101/70
GLASS TRANSITION (Tg): 230°C minimum
LAMINATE REQUIREMENTS
Specification Specification
<0.50 mm ≥0.50 mm
Laminate Requirement [0.0197 in] [0.0197 in] Units Test Method Ref. Para.
1. Peel Strength, minimum 3.9.1.1
A. Low profile copper foil and very low profile
copper foil – all copper foil >17µm [0.669 mil]. AABUS AABUS
2.4.8
B. Standard profile copper foil
N/mm [lb/in] 2.4.8.2
1. After thermal stress 0.70 [4.00] 0.70 [4.00] 3.9.1.1.1
2.4.8.3
2. At 170°C [338°F] 0.70 [4.00] 0.70 [4.00] 3.9.1.1.2
3. After process solutions 0.70 [4.00] 0.70 [4.00] 3.9.1.1.3
C. All other foil – composite AABUS AABUS
2. Volume Resistivity, minimum
A. C-96/35/90 106 –
MΩ–cm 2.5.17.1 3.11.1.3
B. After moisture resistance – 106
C. At elevated temperature E-24/204 104 103
3. Surface Resistivity, minimum
A. C-96/35/90 106 –
MΩ 2.5.17.1 3.11.1.4
B. After moisture resistance – 106
C. At elevated temperature E-24/204 6 x 104 105
4. Moisture Absorption, maximum – 3.0 % 2.6.2.1 3.12.1.1
5. Dielectric Breakdown, minimum – 40 kV 2.5.6 3.11.1.6
6. Permittivity at 1 MHz, maximum 2.5.5.2
3.11.1.1
(Laminate & prepreg as laminated) 4.3 4.3 – 2.5.5.3
3.11.2.1
2.5.5.9
7. Loss Tangent at 1 MHz, maximum 2.5.5.2
3.11.1.2
(Laminate & prepreg as laminated) 0.015 0.015 – 2.5.5.3
3.11.2.2
2.5.5.9
8. Flexural Strength, minimum
A. Length direction – 345 [50,040] N/mm2 [lb/in2] 2.4.4 3.9.1.3
B. Cross direction – 345 [50,040]
9. Flexural Strength at Elevated Temperature 204°C,
– 277 [40,180] N/mm2 [lb/in2] 2.4.4.1 3.9.1.4
length direction, minimum
10. Arc Resistance, minimum 120 120 s 2.5.1 3.11.1.5
11. Thermal Stress 10 s at 288°C [550.4°F], minimum
A. Unetched Pass Visual Pass Visual rating 2.4.13.1 3.10.1.2
B. Etched Pass Visual Pass Visual
12. Electric Strength, minimum 3.11.1.7
– – kV/mm 2.5.6.2
(Laminate & prepreg as laminated) 3.11.2.3
13. Flammability 3.10.2.1
V-1 minimum V-1 minimum rating UL94
(Laminate & prepreg as laminated) 3.10.1.1
14. Other – –
PREPREG REQUIREMENTS
Prepreg Requirement Specification Units Test Method Ref. Para.
1. Shelf Life, minimum (Condition 1/Condition 2) 180/90 Days AABUS 3.17
2. Reinforcement As per IPC-SG-141 or AABUS.
3. Volatile content maximum 1.5 % 2.3.19 3.9.2.2.8
4. Prepreg Parameters – AABUS AABUS 1.1.7
5. Flammability (as laminated) V-1 minimum rating UL94 3.10.2.1
6. Other –
*AABUS = As agreed upon between user and supplier.

58
December 2001 IPC-4101A

Revision Date: December 2001

SPECIFICATION SHEET
SPECIFICATION SHEET #: IPC-4101/71
REINFORCEMENT: 1: Woven E-glass 2: N/A
RESIN SYSTEM: Primary: Cyanate ester
Secondary 1: N/A Secondary 2: N/A
FLAME RETARDANT MECHANISM: Bromine
FILLERS: N/A
ID REFERENCE: UL/ANSI: N/A MIL-S-13949: /29 - GCN
ANSI: 4101/71
GLASS TRANSITION (Tg): 230°C minimum
LAMINATE REQUIREMENTS
Specification Specification
<0.50 mm ≥0.50 mm
Laminate Requirement [0.0197 in] [0.0197 in] Units Test Method Ref. Para.
1. Peel Strength, minimum 3.9.1.1
A. Low profile copper foil and very low profile
copper foil – all copper foil >17µm [0.669 mil]. AABUS AABUS
2.4.8
B. Standard profile copper foil
N/mm [lb/in] 2.4.8.2
1. After thermal stress 0.70 [4.00] 0.70 [4.00] 3.9.1.1.1
2.4.8.3
2. At 125°C [257°F] 0.70 [4.00] 0.70 [4.00] 3.9.1.1.2
3. After process solutions 0.70 [4.00] 0.70 [4.00] 3.9.1.1.3
C. All other foil – composite AABUS AABUS
2. Volume Resistivity, minimum
A. C-96/35/90 106 –
MΩ–cm 2.5.17.1 3.11.1.3
B. After moisture resistance – 106
C. At elevated temperature E-24/204 104 103
3. Surface Resistivity, minimum
A. C-96/35/90 106 –
MΩ 2.5.17.1 3.11.1.4
B. After moisture resistance – 106
C. At elevated temperature E-24/204 104 106
4. Moisture Absorption, maximum – 1.0 % 2.6.2.1 3.12.1.1
5. Dielectric Breakdown, minimum 40 40 kV 2.5.6 3.11.1.6
6. Permittivity at 1 MHz, maximum 2.5.5.2
3.11.1.1
(Laminate & prepreg as laminated) 4.5 4.5 – 2.5.5.3
3.11.2.1
2.5.5.9
7. Loss Tangent at 1 MHz, maximum 2.5.5.2
3.11.1.2
(Laminate & prepreg as laminated) 0.015 0.015 – 2.5.5.3
3.11.2.2
2.5.5.9
8. Flexural Strength, minimum
A. Length direction – 345 [50,040] N/mm2 [lb/in2] 2.4.4 3.9.1.3
B. Cross direction – 345 [50,040]
9. Flexural Strength at Elevated Temperature 204°C,
– 277 [40,180] N/mm2 [lb/in2] 2.4.4.1 3.9.1.4
length direction, minimum
10. Arc Resistance, minimum 120 120 s 2.5.1 3.11.1.5
11. Thermal Stress 10 s at 288°C [550.4°F], minimum
A. Unetched Pass Visual Pass Visual rating 2.4.13.1 3.10.1.2
B. Etched Pass Visual Pass Visual
12. Electric Strength, minimum 3.11.1.7
30 – kV/mm 2.5.6.2
(Laminate & prepreg as laminated) 3.11.2.3
13. Flammability 3.10.2.1
V-1 minimum V-1 minimum rating UL94
(Laminate & prepreg as laminated) 3.10.1.1
14. Other – –
PREPREG REQUIREMENTS
Prepreg Requirement Specification Units Test Method Ref. Para.
1. Shelf Life, minimum (Condition 1/Condition 2) 180/90 Days AABUS 3.17
2. Reinforcement As per IPC-EG-140 or AABUS.
3. Volatile content maximum 1.5 % 2.3.19 3.9.2.2.8
4. Prepreg Parameters – AABUS AABUS 1.1.7
5. Flammability (as laminated) V-1 minimum rating UL94 3.10.2.1
6. Other –
*AABUS = As agreed upon between user and supplier.

59
IPC-4101A December 2001

Revision Date: December 2001

SPECIFICATION SHEET
SPECIFICATION SHEET #: IPC-4101/80
REINFORCEMENT: 1: Woven E-glass, surface 2: Cellulose paper, core
RESIN SYSTEM: Primary: Epoxy
Secondary 1: Phenolic Secondary 2: N/A
FLAME RETARDANT MECHANISM: Bromine/Antimony oxide UL94 Requirement: V-0
FILLERS: Kaolin and/or inorganic catalyst
ID REFERENCE: UL/ANSI: CEM-1 MIL-S-13949: N/A
ANSI: CEM-1/80
GLASS TRANSITION (Tg): 100°C minimum
LAMINATE REQUIREMENTS
Specification Specification
<0.50 mm ≥0.50 mm
Laminate Requirement [0.0197 in] [0.0197 in] Units Test Method Ref. Para.
1. Peel Strength, minimum 3.9.1.1
A. Low profile copper foil and very low profile
copper foil – all copper foil >17µm [0.669 mil]. – –
2.4.8
B. Standard profile copper foil
N/mm [lb/in] 2.4.8.2
1. After thermal stress – – 3.9.1.1.1
2.4.8.3
2. At 125°C [257°F] – – 3.9.1.1.2
3. After process solutions – – 3.9.1.1.3
C. All other foil – composite - -
2. Volume Resistivity, minimum
A. C-96/35/90 – 106
MΩ–cm 2.5.17.1 3.11.1.3
B. After moisture resistance – –
C. At elevated temperature E-24/125 - 103
3. Surface Resistivity, minimum
A. C-96/35/90 – 104
MΩ 2.5.17.1 3.11.1.4
B. After moisture resistance – –
C. At elevated temperature E-24/125 - 103
4. Moisture Absorption, maximum – 0.5 % 2.6.2.1 3.12.1.1
5. Dielectric Breakdown, minimum – 40 kV 2.5.6 3.11.1.6
6. Permittivity at 1 MHz, maximum 2.5.5.2
3.11.1.1
(Laminate & prepreg as laminated) – 5.4 – 2.5.5.3
3.11.2.1
2.5.5.9
7. Loss Tangent at 1 MHz, maximum 2.5.5.2
3.11.1.2
(Laminate & prepreg as laminated) – 0.035 – 2.5.5.3
3.11.2.2
2.5.5.9
8. Flexural Strength, minimum
A. Length direction – 242 [35,100]** N/mm2 [lb/in2] 2.4.4 3.9.1.3
B. Cross direction – 172 [24,950]
9. Flexural Strength at Elevated Temperature, length
– – N/mm2 [lb/in2] 2.4.4.1 3.9.1.4
direction, minimum
10. Arc Resistance, minimum – 60 s 2.5.1 3.11.1.5
11. Thermal Stress 10 s at 288°C [550.4°F], minimum
A. Unetched – Pass Visual rating 2.4.13.1 3.10.1.2
B. Etched – –
12. Electric Strength, minimum 3.11.1.7
– – kV/mm 2.5.6.2
(Laminate & prepreg as laminated) 3.11.2.3
13. Flammability 3.10.2.1
V-0 V-0 rating UL94
(Laminate & prepreg as laminated) 3.10.1.1
14. Other – –
PREPREG REQUIREMENTS
Prepreg Requirement Specification Units Test Method Ref. Para.
1. Shelf Life, minimum (Condition 1/Condition 2) 180/90 Days AABUS 3.17
2. Reinforcement As per IPC-EG-140 or AABUS.
3. Volatile content maximum – % 2.3.19 3.9.2.2.8
4. Prepreg Parameters – AABUS AABUS 1.1.7
5. Other –
6. Other –
*AABUS = As agreed upon between user and supplier.
**As measured on a 1.57 mm [0.06181 in] thick sample.

60
December 2001 IPC-4101A

Revision Date: December 2001

SPECIFICATION SHEET
SPECIFICATION SHEET #: IPC-4101/81
REINFORCEMENT: 1: Woven E-glass, surface 2: Nonwoven E-glass (chopped felt), core
RESIN SYSTEM: Primary: Epoxy
Secondary 1: Multifunctional epoxy Secondary 2: N/A
FLAME RETARDANT MECHANISM: Bromine UL94 Requirement: V-0
FILLERS: Kaolin and/or inorganic catalyst
ID REFERENCE: UL/ANSI: CEM-3 MIL-S-13949: N/A
ANSI: CEM-3/81
GLASS TRANSITION (Tg): N/A
LAMINATE REQUIREMENTS
Specification Specification
<0.50 mm ≥0.50 mm
Laminate Requirement [0.0197 in] [0.0197 in] Units Test Method Ref. Para.
1. Peel Strength, minimum 3.9.1.1
A. Low profile copper foil and very low profile
copper foil – all copper foil >17µm [0.669 mil]. – –
2.4.8
B. Standard profile copper foil
N/mm [lb/in] 2.4.8.2
1. After thermal stress – – 3.9.1.1.1
2.4.8.3
2. At 125°C [257°F] – – 3.9.1.1.2
3. After process solutions – – 3.9.1.1.3
C. All other foil – composite – –
2. Volume Resistivity, minimum
A. C-96/35/90 – 106
MΩ–cm 2.5.17.1 3.11.1.3
B. After moisture resistance – –
C. At elevated temperature E-24/125 – 103
3. Surface Resistivity, minimum
A. C-96/35/90 – 104
MΩ 2.5.17.1 3.11.1.4
B. After moisture resistance – –
C. At elevated temperature E-24/125 – 103
4. Moisture Absorption, maximum – 0.5 % 2.6.2.1 3.12.1.1
5. Dielectric Breakdown, minimum – 40 kV 2.5.6 3.11.1.6
6. Permittivity at 1 MHz, maximum 2.5.5.2
3.11.1.1
(Laminate & prepreg as laminated) – 5.4 – 2.5.5.3
3.11.2.1
2.5.5.9
7. Loss Tangent at 1 MHz, maximum 2.5.5.2
3.11.1.2
(Laminate & prepreg as laminated) – 0.035 – 2.5.5.3
3.11.2.2
2.5.5.9
8. Flexural Strength, minimum
A. Length direction – 276 [40,030]** N/mm2 [lb/in2] 2.4.4 3.9.1.3
B. Cross direction – 186 [26,980]
9. Flexural Strength at Elevated Temperature, length
– – N/mm2 [lb/in2] 2.4.4.1 3.9.1.4
direction, minimum
10. Arc Resistance, minimum – 60 s 2.5.1 3.11.1.5
11. Thermal Stress 10 s at 288°C [550.4°F], minimum
A. Unetched – Pass Visual rating 2.4.13.1 3.10.1.2
B. Etched – –
12. Electric Strength, minimum 3.11.1.7
– – kV/mm 2.5.6.2
(Laminate & prepreg as laminated) 3.11.2.3
13. Flammability 3.10.2.1
V-0 V-0 rating UL94
(Laminate & prepreg as laminated) 3.10.1.1
14. Other – –
PREPREG REQUIREMENTS
Prepreg Requirement Specification Units Test Method Ref. Para.
1. Shelf Life, minimum (Condition 1/Condition 2) 180/90 Days AABUS 3.17
2. Reinforcement As per IPC-EG-140 or AABUS.
3. Volatile content maximum – % 2.3.19 3.9.2.2.8
4. Prepreg Parameters – AABUS AABUS 1.1.7
5. Other –
6. Other –
*AABUS = As agreed upon between user and supplier.
**As measured on a 1.57 mm [0.06181 in] thick sample.

61
IPC-4101A December 2001

Revision Date: December 2001

SPECIFICATION SHEET
SPECIFICATION SHEET #: IPC-4101/82
REINFORCEMENT: 1: Woven E-glass 2: N/A
RESIN SYSTEM: Primary: Epoxy
Secondary 1: Multifunctional epoxy Secondary 2: N/A
FLAME RETARDANT MECHANISM: Bromine Minimum UL94 Requirement: V-1
FILLERS: Kaolin and/or inorganic catalyst
ID REFERENCE: UL/ANSI: FR-4 MIL-S-13949: N/A
ANSI: FR-4/82
GLASS TRANSITION (Tg): 110°C minimum
LAMINATE REQUIREMENTS
Specification Specification
<0.50 mm ≥0.50 mm
Laminate Requirement [0.0197 in] [0.0197 in] Units Test Method Ref. Para.
1. Peel Strength, minimum 3.9.1.1
A. Low profile copper foil and very low profile
copper foil – all copper foil >17µm [0.669 mil]. – –
2.4.8
B. Standard profile copper foil
N/mm [lb/in] 2.4.8.2
1. After thermal stress – – 3.9.1.1.1
2.4.8.3
2. At 125°C [257°F] – – 3.9.1.1.2
3. After process solutions – – 3.9.1.1.3
C. All other foil – composite – –
2. Volume Resistivity, minimum
A. C-96/35/90 106 –
MΩ–cm 2.5.17.1 3.11.1.3
B. After moisture resistance – 106
C. At elevated temperature E-24/125 103 103
3. Surface Resistivity, minimum
A. C-96/35/90 104 –
MΩ 2.5.17.1 3.11.1.4
B. After moisture resistance – 104
C. At elevated temperature E-24/125 103 103
4. Moisture Absorption, maximum – 0.35 % 2.6.2.1 3.12.1.1
5. Dielectric Breakdown, minimum – 40 kV 2.5.6 3.11.1.6
6. Permittivity at 1 MHz, maximum 2.5.5.2
3.11.1.1
(Laminate & prepreg as laminated) 5.4 5.4 – 2.5.5.3
3.11.2.1
2.5.5.9
7. Loss Tangent at 1 MHz, maximum 2.5.5.2
3.11.1.2
(Laminate & prepreg as laminated) 0.035 0.030 – 2.5.5.3
3.11.2.2
2.5.5.9
8. Flexural Strength, minimum
A. Length direction – 415 [60,190] N/mm2 [lb/in2] 2.4.4 3.9.1.3
B. Cross direction – 345 [50,040]
9. Flexural Strength at Elevated Temperature, length
– – N/mm2 [lb/in2] 2.4.4.1 3.9.1.4
direction, minimum
10. Arc Resistance, minimum 60 60 s 2.5.1 3.11.1.5
11. Thermal Stress 10 s at 288°C [550.4°F], minimum
A. Unetched Pass Visual Pass Visual rating 2.4.13.1 3.10.1.2
B. Etched – –
12. Electric Strength, minimum 3.11.1.7
30 – kV/mm 2.5.6.2
(Laminate & prepreg as laminated) 3.11.2.3
13. Flammability 3.10.2.1
V-1 minimum V-1 minimum rating UL94
(Laminate & prepreg as laminated) 3.10.1.1
14. Other – –
PREPREG REQUIREMENTS
Prepreg Requirement Specification Units Test Method Ref. Para.
1. Shelf Life, minimum (Condition 1/Condition 2) 180/90 Days AABUS 3.17
2. Reinforcement As per IPC-EG-140 or AABUS.
3. Volatile content maximum – % 2.3.19 3.9.2.2.8
4. Prepreg Parameters – AABUS AABUS 1.1.7
5. Flammability (as laminated) V-1 minimum rating UL94 3.10.2.1
6. Other –
*AABUS = As agreed upon between user and supplier.

62
December 2001 IPC-4101A

Rvision Date: December 2001

SPECIFICATION SHEET
SPECIFICATION SHEET #: IPC-4101/83
REINFORCEMENT: 1: Woven E-glass 2: N/A
RESIN SYSTEM: Primary: Epoxy
Secondary 1: Multifunctional epoxy Secondary 2: N/A
FLAME RETARDANT MECHANISM: Bromine Minimum UL94 Requirement: V-1
FILLERS: Kaolin and/or inorganic catalyst
ID REFERENCE: UL/ANSI: FR-4 MIL-S-13949: N/A
ANSI: FR-4/83
GLASS TRANSITION (Tg): 150°C - 200°C
LAMINATE REQUIREMENTS
Specification Specification
<0.50 mm ≥0.50 mm
Laminate Requirement [0.0197 in] [0.0197 in] Units Test Method Ref. Para.
1. Peel Strength, minimum 3.9.1.1
A. Low profile copper foil and very low profile
copper foil – all copper foil >17µm [0.669 mil]. – –
2.4.8
B. Standard profile copper foil
N/mm [lb/in] 2.4.8.2
1. After thermal stress – – 3.9.1.1.1
2.4.8.3
2. At 125°C [257°F] – – 3.9.1.1.2
3. After process solutions – – 3.9.1.1.3
C. All other foil – composite – –
2. Volume Resistivity, minimum
A. C-96/35/90 106 –
MΩ–cm 2.5.17.1 3.11.1.3
B. After moisture resistance – 104
C. At elevated temperature E-24/125 103 103
3. Surface Resistivity, minimum
A. C-96/35/90 104 –
MΩ 2.5.17.1 3.11.1.4
B. After moisture resistance – 104
C. At elevated temperature E-24/125 103 103
4. Moisture Absorption, maximum – 0.80 % 2.6.2.1 3.12.1.1
5. Dielectric Breakdown, minimum – 40 kV 2.5.6 3.11.1.6
6. Permittivity at 1 MHz, maximum 2.5.5.2
3.11.1.1
(Laminate & prepreg as laminated) 5.4 5.4 – 2.5.5.3
3.11.2.1
2.5.5.9
7. Loss Tangent at 1 MHz, maximum 2.5.5.2
3.11.1.2
(Laminate & prepreg as laminated) 0.035 0.035 – 2.5.5.3
3.11.2.2
2.5.5.9
8. Flexural Strength, minimum
A. Length direction – 415 [60,190] N/mm2 [lb/in2] 2.4.4 3.9.1.3
B. Cross direction – 345 [50,040]
9. Flexural Strength at Elevated Temperature, length
– – N/mm2 [lb/in2] 2.4.4.1 3.9.1.4
direction, minimum
10. Arc Resistance, minimum 90 90 s 2.5.1 3.11.1.5
11. Thermal Stress 10 s at 288°C [550.4°F], minimum
A. Unetched Pass Visual Pass Visual rating 2.4.13.1 3.10.1.2
B. Etched Pass Visual Pass Visual
12. Electric Strength, minimum 3.11.1.7
30 – kV/mm 2.5.6.2
(Laminate & prepreg as laminated) 3.11.2.3
13. Flammability 3.10.2.1
V-1 minimum V-1 minimum rating UL94
(Laminate & prepreg as laminated) 3.10.1.1
14. Other
PREPREG REQUIREMENTS
Prepreg Requirement Specification Units Test Method Ref. Para.
1. Shelf Life, minimum (Condition 1/Condition 2) 180/90 Days AABUS 3.17
2. Reinforcement As per IPC-4412 or AABUS.
3. Volatile content maximum 1.5 % 2.3.19 3.9.2.2.8
4. Prepreg Parameters – AABUS AABUS 1.1.7
5. Flammability (as laminated) V-1 minimum rating UL94 3.10.2.1
6. Other –
*AABUS = As agreed upon between user and supplier.

63
IPC-4101A December 2001

Revision Date: December 2001

SPECIFICATION SHEET
SPECIFICATION SHEET #: IPC-4101/90
REINFORCEMENT: 1: Woven E-glass, surface 2: N/A
RESIN SYSTEM: Primary: Polyphenylene ether
Secondary 1: N/A Secondary 2: N/A
FLAME RETARDANT MECHANISM: Bromine/Antimony oxide
FILLERS: N/A
ID REFERENCE: UL/ANSI: N/A MIL-S-13949: N/A
ANSI: 4101/90
GLASS TRANSITION (Tg): 175°C minimum
LAMINATE REQUIREMENTS
Specification Specification
<0.50 mm ≥0.50 mm
Laminate Requirement [0.0197 in] [0.0197 in] Units Test Method Ref. Para.
1. Peel Strength, minimum 3.9.1.1
A. Low profile copper foil and very low profile
copper foil – all copper foil >17µm [0.669 mil]. 0.70 [4.00] 0.70 [4.00]
2.4.8
B. Standard profile copper foil
N/mm [lb/in] 2.4.8.2
1. After thermal stress 0.70 [4.00] 0.70 [4.00] 3.9.1.1.1
2.4.8.3
2. At 125°C [257°F] 0.70 [4.00] 0.70 [4.00] 3.9.1.1.2
3. After process solutions 0.55 [3.14] 0.55 [3.14] 3.9.1.1.3
C. All other foil – composite AABUS AABUS
2. Volume Resistivity, minimum
A. C-96/35/90 106 –
MΩ–cm 2.5.17.1 3.11.1.3
B. After moisture resistance – 106
C. At elevated temperature E-24/125 106 106
3. Surface Resistivity, minimum
A. C-96/35/90 105 –
MΩ 2.5.17.1 3.11.1.4
B. After moisture resistance – 105
C. At elevated temperature E-24/125 105 105
4. Moisture Absorption, maximum – 0.5 % 2.6.2.1 3.12.1.1
5. Dielectric Breakdown, minimum – 40 kV 2.5.6 3.11.1.6
6. Permittivity at 1 MHz, maximum 2.5.5.2
3.11.1.1
(Laminate & prepreg as laminated) 4.2 4.2 – 2.5.5.3
3.11.2.1
2.5.5.9
7. Loss Tangent at 1 MHz, maximum 2.5.5.2
3.11.1.2
(Laminate & prepreg as laminated) 0.015 0.015 – 2.5.5.3
3.11.2.2
2.5.5.9
8. Flexural Strength, minimum
A. Length direction – 415 [60,190] N/mm2 [lb/in2] 2.4.4 3.9.1.3
B. Cross direction – 345 [50,040]
9. Flexural Strength at Elevated Temperature, length
– – N/mm2 [lb/in2] 2.4.4.1 3.9.1.4
direction, minimum
10. Arc Resistance, minimum 60 60 s 2.5.1 3.11.1.5
11. Thermal Stress 10 s at 288°C [550.4°F], minimum
A. Unetched Pass Visual Pass Visual rating 2.4.13.1 3.10.1.2
B. Etched Pass Visual Pass Visual
12. Electric Strength, minimum 3.11.1.7
30 – kV/mm 2.5.6.2
(Laminate & prepreg as laminated) 3.11.2.3
13. Flammability 3.10.2.1
V-1 minimum V-1 minimum rating UL94
(Laminate & prepreg as laminated) 3.10.1.1
14. Other – –
PREPREG REQUIREMENTS
Prepreg Requirement Specification Units Test Method Ref. Para.
1. Shelf Life, minimum (Condition 1/Condition 2) 180/90 Days AABUS 3.17
2. Reinforcement As per IPC-EG-140
3. Volatile content maximum – % 2.3.19 3.9.2.2.8
4. Prepreg Parameters – AABUS AABUS 1.1.7
5. Flammability (as laminated) V-1 minimum rating UL94 3.10.2.1
6. Other –
*AABUS = As agreed upon between user and supplier.

64
December 2001 IPC-4101A

Revision Date: December 2001

SPECIFICATION SHEET
SPECIFICATION SHEET #: IPC-4101/91
REINFORCEMENT: 1: Woven E-glass 2: N/A
RESIN SYSTEM: Primary: Polyphenylene ether
Secondary 1: N/A Secondary 2: N/A
FLAME RETARDANT MECHANISM: Bromine
FILLERS: N/A
ID REFERENCE: UL/ANSI: N/A MIL-S-13949: N/A
ANSI: 4101/91
GLASS TRANSITION (Tg): 175°C minimum
LAMINATE REQUIREMENTS
Specification Specification
<0.50 mm ≥0.50 mm
Laminate Requirement [0.0197 in] [0.0197 in] Units Test Method Ref. Para.
1. Peel Strength, minimum 3.9.1.1
A. Low profile copper foil and very low profile
copper foil – all copper foil >17µm [0.669 mil]. 0.70 [4.00] 0.70 [4.00]
2.4.8
B. Standard profile copper foil
N/mm [lb/in] 2.4.8.2
1. After thermal stress 0.70 [4.00] 0.70 [4.00] 3.9.1.1.1
2.4.8.3
2. At 125°C [257°F] 0.70 [4.00] 0.70 [4.00] 3.9.1.1.2
3. After process solutions 0.55 [3.14] 0.55 [3.14] 3.9.1.1.3
C. All other foil – composite AABUS AABUS
2. Volume Resistivity, minimum
A. C-96/35/90 106 –
MΩ–cm 2.5.17.1 3.11.1.3
B. After moisture resistance – 106
C. At elevated temperature E-24/125 106 106
3. Surface Resistivity, minimum
A. C-96/35/90 105 –
MΩ 2.5.17.1 3.11.1.4
B. After moisture resistance – 105
C. At elevated temperature E-24/125 105 105
4. Moisture Absorption, maximum – 0.5 % 2.6.2.1 3.12.1.1
5. Dielectric Breakdown, minimum – 40 kV 2.5.6 3.11.1.6
6. Permittivity at 1 MHz, maximum 2.5.5.2
3.11.1.1
(Laminate & prepreg as laminated) 4.2 4.2 – 2.5.5.3
3.11.2.1
2.5.5.9
7. Loss Tangent at 1 MHz, maximum 2.5.5.2
3.11.1.2
(Laminate & prepreg as laminated) 0.015 0.015 – 2.5.5.3
3.11.2.2
2.5.5.9
8. Flexural Strength, minimum
A. Length direction – 415 [60,190] N/mm2 [lb/in2] 2.4.4 3.9.1.3
B. Cross direction – 345 [50,040]
9. Flexural Strength at Elevated Temperature, length
– – N/mm2 [lb/in2] 2.4.4.1 3.9.1.4
direction, minimum
10. Arc Resistance, minimum 60 60 s 2.5.1 3.11.1.5
11. Thermal Stress 10 s at 288°C [550.4°F], minimum
A. Unetched Pass Visual Pass Visual rating 2.4.13.1 3.10.1.2
B. Etched Pass Visual Pass Visual
12. Electric Strength, minimum 3.11.1.7
30 – kV/mm 2.5.6.2
(Laminate & prepreg as laminated) 3.11.2.3
13. Flammability 3.10.2.1
V-1 minimum V-1 minimum rating UL94
(Laminate & prepreg as laminated) 3.10.1.1
14. Other – –
PREPREG REQUIREMENTS
Prepreg Requirement Specification Units Test Method Ref. Para.
1. Shelf Life, minimum (Condition 1/Condition 2) 180/90 Days AABUS 3.17
2. Reinforcement As per IPC-EG-140
3. Volatile content maximum – % 2.3.19 3.9.2.2.8
4. Prepreg Parameters – AABUS AABUS 1.1.7
5. Flammability (as laminated) V-1 minimum rating UL94 3.10.2.1
6. Other –
*AABUS = As agreed upon between user and supplier.

65
IPC-4101A December 2001

Revision Date: December 2001

SPECIFICATION SHEET
SPECIFICATION SHEET #: IPC-4101/92
REINFORCEMENT: 1: Woven E-glass 2: N/A
RESIN SYSTEM: Primary: Epoxy
Secondary 1: Multifunctional epoxy Secondary 2: N/A
FLAME RETARDANT MECHANISM: Phosphorous Minimum UL94 Requirement: V-1
FILLERS: N/A
ID REFERENCE: UL/ANSI: FR-4 MIL-S-13949: N/A
ANSI: FR-4/92
GLASS TRANSITION (Tg): 110°C - 150°C
LAMINATE REQUIREMENTS
Specification Specification
<0.50 mm ≥0.50 mm
Laminate Requirement [0.0197 in] [0.0197 in] Units Test Method Ref. Para.
1. Peel Strength, minimum 3.9.1.1
A. Low profile copper foil and very low profile
copper foil – all copper foil >17µm [0.669 mil]. 0.70 [4.00] 0.70 [4.00]
2.4.8
B. Standard profile copper foil
N/mm [lb/in] 2.4.8.2
1. After thermal stress 0.80 [4.57] 1.05 [6.00] 3.9.1.1.1
2.4.8.3
2. At 125°C [257°F] 0.70 [4.00] 0.70 [4.00] 3.9.1.1.2
3. After process solutions 0.55 [3.14] 0.80 [4.57] 3.9.1.1.3
C. All other foil – composite AABUS AABUS
2. Volume Resistivity, minimum
A. C-96/35/90 106 –
MΩ–cm 2.5.17.1 3.11.1.3
B. After moisture resistance – 106
C. At elevated temperature E-24/125 103 103
3. Surface Resistivity, minimum
A. C-96/35/90 104 –
MΩ 2.5.17.1 3.11.1.4
B. After moisture resistance – 104
C. At elevated temperature E-24/125 103 103
4. Moisture Absorption, maximum – 0.80 % 2.6.2.1 3.12.1.1
5. Dielectric Breakdown, minimum – 40 kV 2.5.6 3.11.1.6
6. Permittivity at 1 MHz, maximum 2.5.5.2
3.11.1.1
(Laminate & prepreg as laminated) 5.4 5.4 – 2.5.5.3
3.11.2.1
2.5.5.9
7. Loss Tangent at 1 MHz, maximum 2.5.5.2
3.11.1.2
(Laminate & prepreg as laminated) 0.035 0.035 – 2.5.5.3
3.11.2.2
2.5.5.9
8. Flexural Strength, minimum
A. Length direction – 415 [60,190] N/mm2 [lb/in2] 2.4.4 3.9.1.3
B. Cross direction – 345 [50,040]
9. Flexural Strength at Elevated Temperature, length
– – N/mm2 [lb/in2] 2.4.4.1 3.9.1.4
direction, minimum
10. Arc Resistance, minimum 60 60 s 2.5.1 3.11.1.5
11. Thermal Stress 10 s at 288°C [550.4°F], minimum
A. Unetched Pass Visual Pass Visual rating 2.4.13.1 3.10.1.2
B. Etched Pass Visual Pass Visual
12. Electric Strength, minimum 3.11.1.7
30 – kV/mm 2.5.6.2
(Laminate & prepreg as laminated) 3.11.2.3
13. Flammability 3.10.2.1
V-1 minimum V-1 minimum rating UL94
(Laminate & prepreg as laminated) 3.10.1.1
14. Halogen Content, maximum TBD TBD ppm TBD 3.10.1.9
15. Other – –
PREPREG REQUIREMENTS
Prepreg Requirement Specification Units Test Method Ref. Para.
1. Shelf Life, minimum (Condition 1/Condition 2) 180/90 Days AABUS 3.17
2. Reinforcement As per IPC-4412 or AABUS.
3. Volatile content maximum 0.75 % 2.3.19 3.9.2.2.8
4. Prepreg Parameters – AABUS AABUS 1.1.7
5. Flammability (as laminated) V-1 minimum rating UL94 3.10.2.1
6. Other –
*AABUS = As agreed upon between user and supplier.

66
December 2001 IPC-4101A

Revision Date: December 2001

SPECIFICATION SHEET
SPECIFICATION SHEET #: IPC-4101/93
REINFORCEMENT: 1: Woven E-glass 2: N/A
RESIN SYSTEM: Primary: Epoxy
Secondary 1: Multifunctional epoxy Secondary 2: N/A
FLAME RETARDANT MECHANISM: Aluminum hydroxide Minimum UL94 Requirement: V-1
FILLERS: N/A
ID REFERENCE: UL/ANSI: FR-4 MIL-S-13949: N/A
ANSI: FR-4/93
GLASS TRANSITION (Tg): 110°C - 150°C
LAMINATE REQUIREMENTS
Specification Specification
<0.50 mm ≥0.50 mm
Laminate Requirement [0.0197 in] [0.0197 in] Units Test Method Ref. Para.
1. Peel Strength, minimum 3.9.1.1
A. Low profile copper foil and very low profile
copper foil – all copper foil >17µm [0.669 mil]. 0.70 [4.00] 0.70 [4.00]
2.4.8
B. Standard profile copper foil
N/mm [lb/in] 2.4.8.2
1. After thermal stress 0.80 [4.57] 1.05 [6.00] 3.9.1.1.1
2.4.8.3
2. At 125°C [257°F] 0.70 [4.00] 0.70 [4.00] 3.9.1.1.2
3. After process solutions 0.55 [3.14] 0.80 [4.57] 3.9.1.1.3
C. All other foil – composite AABUS AABUS
2. Volume Resistivity, minimum
A. C-96/35/90 106 –
MΩ–cm 2.5.17.1 3.11.1.3
B. After moisture resistance – 106
C. At elevated temperature E-24/125 103 103
3. Surface Resistivity, minimum
A. C-96/35/90 104 –
MΩ 2.5.17.1 3.11.1.4
B. After moisture resistance – 104
C. At elevated temperature E-24/125 103 103
4. Moisture Absorption, maximum – 0.80 % 2.6.2.1 3.12.1.1
5. Dielectric Breakdown, minimum – 40 kV 2.5.6 3.11.1.6
6. Permittivity at 1 MHz, maximum 2.5.5.2
3.11.1.1
(Laminate & prepreg as laminated) 5.4 5.4 – 2.5.5.3
3.11.2.1
2.5.5.9
7. Loss Tangent at 1 MHz, maximum 2.5.5.2
3.11.1.2
(Laminate & prepreg as laminated) 0.035 0.035 – 2.5.5.3
3.11.2.2
2.5.5.9
8. Flexural Strength, minimum
A. Length direction – 415 [60,190] N/mm2 [lb/in2] 2.4.4 3.9.1.3
B. Cross direction – 345 [50,040]
9. Flexural Strength at Elevated Temperature, length
– – N/mm2 [lb/in2] 2.4.4.1 3.9.1.4
direction, minimum
10. Arc Resistance, minimum 60 60 s 2.5.1 3.11.1.5
11. Thermal Stress 10 s at 288°C [550.4°F], minimum
A. Unetched Pass Visual Pass Visual rating 2.4.13.1 3.10.1.2
B. Etched Pass Visual Pass Visual
12. Electric Strength, minimum 3.11.1.7
30 – kV/mm 2.5.6.2
(Laminate & prepreg as laminated) 3.11.2.3
13. Flammability 3.10.2.1
V-1 minimum V-1 minimum rating UL94
(Laminate & prepreg as laminated) 3.10.1.1
14. Halogen Content, maximum TBD TBD ppm TBD 3.10.1.9
15. Other – –
PREPREG REQUIREMENTS
Prepreg Requirement Specification Units Test Method Ref. Para.
1. Shelf Life, minimum (Condition 1/Condition 2) 180/90 Days AABUS 3.17
2. Reinforcement As per IPC-4412 or AABUS.
3. Volatile content maximum 0.75 % 2.3.19 3.9.2.2.8
4. Prepreg Parameters – AABUS AABUS 1.1.7
5. Flammability (as laminated) V-1 minimum rating UL94 3.10.2.1
6. Other –
*AABUS = As agreed upon between user and supplier.

67
IPC-4101A December 2001

Revision Date: December 2001

SPECIFICATION SHEET
SPECIFICATION SHEET #: IPC-4101/94
REINFORCEMENT: 1: Woven E-glass 2: N/A
RESIN SYSTEM: Primary: Epoxy
Secondary 1: Multifunctional epoxy Secondary 2: N/A
FLAME RETARDANT MECHANISM: Phosphorous Minimum UL94 Requirement: V-1
FILLERS: N/A
ID REFERENCE: UL/ANSI: FR-4 MIL-S-13949: N/A
ANSI: FR-4/94
GLASS TRANSITION (Tg): 150°C - 200°C
LAMINATE REQUIREMENTS
Specification Specification
<0.50 mm ≥0.50 mm
Laminate Requirement [0.0197 in] [0.0197 in] Units Test Method Ref. Para.
1. Peel Strength, minimum 3.9.1.1
A. Low profile copper foil and very low profile
copper foil – all copper foil >17µm [0.669 mil]. 0.70 [4.00] 0.70 [4.00]
2.4.8
B. Standard profile copper foil
N/mm [lb/in] 2.4.8.2
1. After thermal stress 0.80 [4.57] 1.05 [6.00] 3.9.1.1.1
2.4.8.3
2. At 125°C [257°F] 0.70 [4.00] 0.70 [4.00] 3.9.1.1.2
3. After process solutions 0.55 [3.14] 0.80 [4.57] 3.9.1.1.3
C. All other foil – composite AABUS AABUS
2. Volume Resistivity, minimum
A. C-96/35/90 106 –
MΩ–cm 2.5.17.1 3.11.1.3
B. After moisture resistance – 104
C. At elevated temperature E-24/125 103 103
3. Surface Resistivity, minimum
A. C-96/35/90 104 –
MΩ 2.5.17.1 3.11.1.4
B. After moisture resistance – 104
C. At elevated temperature E-24/125 103 103
4. Moisture Absorption, maximum – 0.80 % 2.6.2.1 3.12.1.1
5. Dielectric Breakdown, minimum – 40 kV 2.5.6 3.11.1.6
6. Permittivity at 1 MHz, maximum 2.5.5.2
3.11.1.1
(Laminate & prepreg as laminated) 5.4 5.4 – 2.5.5.3
3.11.2.1
2.5.5.9
7. Loss Tangent at 1 MHz, maximum 2.5.5.2
3.11.1.2
(Laminate & prepreg as laminated) 0.035 0.035 – 2.5.5.3
3.11.2.2
2.5.5.9
8. Flexural Strength, minimum
A. Length direction – 415 [60,190] N/mm2 [lb/in2] 2.4.4 3.9.1.3
B. Cross direction – 345 [50,040]
9. Flexural Strength at Elevated Temperature, length
– – N/mm2 [lb/in2] 2.4.4.1 3.9.1.4
direction, minimum
10. Arc Resistance, minimum 90 90 s 2.5.1 3.11.1.5
11. Thermal Stress 10 s at 288°C [550.4°F], minimum
A. Unetched Pass Visual Pass Visual rating 2.4.13.1 3.10.1.2
B. Etched Pass Visual Pass Visual
12. Electric Strength, minimum 3.11.1.7
30 – kV/mm 2.5.6.2
(Laminate & prepreg as laminated) 3.11.2.3
13. Flammability 3.10.2.1
V-1 minimum V-1 minimum rating UL94
(Laminate & prepreg as laminated) 3.10.1.1
14. Halogen Content, maximum TBD TBD ppm TBD 3.10.1.9
15. Other – –
PREPREG REQUIREMENTS
Prepreg Requirement Specification Units Test Method Ref. Para.
1. Shelf Life, minimum (Condition 1/Condition 2) 180/90 Days AABUS 3.17
2. Reinforcement As per IPC-4412 or AABUS.
3. Volatile content maximum 1.5 % 2.3.19 3.9.2.2.8
4. Prepreg Parameters – AABUS AABUS 1.1.7
5. Flammability (as laminated) V-1 minimum rating UL94 3.10.2.1
6. Other –
*AABUS = As agreed upon between user and supplier.

68
December 2001 IPC-4101A

Revision Date: December 2001

SPECIFICATION SHEET
SPECIFICATION SHEET #: IPC-4101/95
REINFORCEMENT: 1: Woven E-glass 2: N/A
RESIN SYSTEM: Primary: Epoxy
Secondary 1: Multifunctional epoxy Secondary 2: N/A
FLAME RETARDANT MECHANISM: Aluminum hydroxide Minimum UL94 Requirement: V-1
FILLERS: N/A
ID REFERENCE: UL/ANSI: FR-4 MIL-S-13949: N/A
ANSI: FR-4/95
GLASS TRANSITION (Tg): 150°C - 200°C
LAMINATE REQUIREMENTS
Specification Specification
<0.50 mm ≥0.50 mm
Laminate Requirement [0.0197 in] [0.0197 in] Units Test Method Ref. Para.
1. Peel Strength, minimum 3.9.1.1
A. Low profile copper foil and very low profile
copper foil – all copper foil >17µm [0.669 mil]. 0.70 [4.00] 0.70 [4.00]
2.4.8
B. Standard profile copper foil
N/mm [lb/in] 2.4.8.2
1. After thermal stress 0.80 [4.57] 1.05 [6.00] 3.9.1.1.1
2.4.8.3
2. At 125°C [257°F] 0.70 [4.00] 0.70 [4.00] 3.9.1.1.2
3. After process solutions 0.55 [3.14] 0.80 [4.57] 3.9.1.1.3
C. All other foil – composite AABUS AABUS
2. Volume Resistivity, minimum
A. C-96/35/90 106 –
MΩ–cm 2.5.17.1 3.11.1.3
B. After moisture resistance – 104
C. At elevated temperature E-24/125 103 103
3. Surface Resistivity, minimum
A. C-96/35/90 104 –
MΩ 2.5.17.1 3.11.1.4
B. After moisture resistance – 104
C. At elevated temperature E-24/125 103 103
4. Moisture Absorption, maximum – 0.80 % 2.6.2.1 3.12.1.1
5. Dielectric Breakdown, minimum – 40 kV 2.5.6 3.11.1.6
6. Permittivity at 1 MHz, maximum 2.5.5.2
3.11.1.1
(Laminate & prepreg as laminated) 5.4 5.4 – 2.5.5.3
3.11.2.1
2.5.5.9
7. Loss Tangent at 1 MHz, maximum 2.5.5.2
3.11.1.2
(Laminate & prepreg as laminated) 0.035 0.035 – 2.5.5.3
3.11.2.2
2.5.5.9
8. Flexural Strength, minimum
A. Length direction – 415 [60,190] N/mm2 [lb/in2] 2.4.4 3.9.1.3
B. Cross direction – 345 [50,040]
9. Flexural Strength at Elevated Temperature, length
– – N/mm2 [lb/in2] 2.4.4.1 3.9.1.4
direction, minimum
10. Arc Resistance, minimum 90 90 s 2.5.1 3.11.1.5
11. Thermal Stress 10 s at 288°C [550.4°F], minimum
A. Unetched Pass Visual Pass Visual rating 2.4.13.1 3.10.1.2
B. Etched Pass Visual Pass Visual
12. Electric Strength, minimum 3.11.1.7
30 – kV/mm 2.5.6.2
(Laminate & prepreg as laminated) 3.11.2.3
13. Flammability 3.10.2.1
V-1 minimum V-1 minimum rating UL94
(Laminate & prepreg as laminated) 3.10.1.1
14. Halogen Content, maximum TBD TBD ppm TBD 3.10.1.9
15. Other – –
PREPREG REQUIREMENTS
Prepreg Requirement Specification Units Test Method Ref. Para.
1. Shelf Life, minimum (Condition 1/Condition 2) 180/90 Days AABUS 3.17
2. Reinforcement As per IPC-4412 or AABUS.
3. Volatile content maximum 1.5 % 2.3.19 3.9.2.2.8
4. Prepreg Parameters – AABUS AABUS 1.1.7
5. Flammability (as laminated) V-1 minimum rating UL94 3.10.2.1
6. Other –
*AABUS = As agreed upon between user and supplier.

69
IPC-4101A December 2001

Revision Date: December 2001

SPECIFICATION SHEET
SPECIFICATION SHEET #: IPC-4101/96
REINFORCEMENT: 1: Woven E-glass 2: N/A
RESIN SYSTEM: Primary: Polyphenylene ether
Secondary 1: N/A Secondary 2: N/A
FLAME RETARDANT MECHANISM: Non-Bromine/Non-Antimony
FILLERS: N/A
ID REFERENCE: UL/ANSI: N/A MIL-S-13949: N/A
ANSI: 4101/96
GLASS TRANSITION (Tg): 175°C minimum
LAMINATE REQUIREMENTS
Specification Specification
<0.50 mm ≥0.50 mm
Laminate Requirement [0.0197 in] [0.0197 in] Units Test Method Ref. Para.
1. Peel Strength, minimum 3.9.1.1
A. Low profile copper foil and very low profile
copper foil – all copper foil >17µm [0.669 mil]. 0.70 [4.00] 0.70 [4.00]
2.4.8
B. Standard profile copper foil
N/mm [lb/in] 2.4.8.2
1. After thermal stress 0.70 [4.00] 0.70 [4.00] 3.9.1.1.1
2.4.8.3
2. At 125°C [257°F] 0.70 [4.00] 0.70 [4.00] 3.9.1.1.2
3. After process solutions 0.55 [3.14] 0.55 [3.14] 3.9.1.1.3
C. All other foil – composite AABUS AABUS
2. Volume Resistivity, minimum
A. C-96/35/90 106 –
MΩ–cm 2.5.17.1 3.11.1.3
B. After moisture resistance – 106
C. At elevated temperature E-24/125 106 106
3. Surface Resistivity, minimum
A. C-96/35/90 105 –
MΩ 2.5.17.1 3.11.1.4
B. After moisture resistance – 105
C. At elevated temperature E-24/125 105 105
4. Moisture Absorption, maximum – 0.5 % 2.6.2.1 3.12.1.1
5. Dielectric Breakdown, minimum – 40 kV 2.5.6 3.11.1.6
6. Permittivity at 1 MHz, maximum 2.5.5.2
3.11.1.1
(Laminate & prepreg as laminated) 4.2 4.2 – 2.5.5.3
3.11.2.1
2.5.5.9
7. Loss Tangent at 1 MHz, maximum 2.5.5.2
3.11.1.2
(Laminate & prepreg as laminated) 0.015 0.015 – 2.5.5.3
3.11.2.2
2.5.5.9
8. Flexural Strength, minimum
A. Length direction – 415 [60,190] N/mm2 [lb/in2] 2.4.4 3.9.1.3
B. Cross direction – 345 [50,040]
9. Flexural Strength at Elevated Temperature, length
– – N/mm2 [lb/in2] 2.4.4.1 3.9.1.4
direction, minimum
10. Arc Resistance, minimum 60 60 s 2.5.1 3.11.1.5
11. Thermal Stress 10 s at 288°C [550.4°F], minimum
A. Unetched Pass Visual Pass Visual s 2.4.13.1 3.10.1.2
B. Etched Pass Visual Pass Visual
12. Electric Strength, minimum 3.11.1.7
30 – kV/mm 2.5.6.2
(Laminate & prepreg as laminated) 3.11.2.3
13. Flammability 3.10.2.1
V-1 minimum V-1 minimum rating UL94
(Laminate & prepreg as laminated) 3.10.1.1
14. Other – –
PREPREG REQUIREMENTS
Prepreg Requirement Specification Units Test Method Ref. Para.
1. Shelf Life, minimum (Condition 1/Condition 2) 180/90 Days AABUS 3.17
2. Reinforcement As per IPC-EG-140
3. Volatile content maximum – % 2.3.19 3.9.2.2.8
4. Prepreg Parameters – AABUS AABUS 1.1.7
5. Flammability (as laminated) V-1 minimum rating UL94 3.10.2.1
6. Other –
*AABUS = As agreed upon between user and supplier.

70
December 2001 IPC-4101A

Revision Date: December 2001

SPECIFICATION SHEET
SPECIFICATION SHEET #: IPC-4101/97
REINFORCEMENT: 1: Woven E-glass 2: N/A
RESIN SYSTEM: Primary: Difunctional epoxy
Secondary 1: Multifunctional epoxy Secondary 2: N/A
FLAME RETARDANT MECHANISM: Bromine Minimum UL94 Requirement: V-1
FILLERS: Inorganic fillers
ID REFERENCE: UL/ANSI: FR-4 MIL-S-13949: /04 - GF, GFN, GFK, GFP, GFM
ANSI: FR-4/97
GLASS TRANSITION (Tg): 110°C to 150°C
LAMINATE REQUIREMENTS
Specification Specification
<0.50 mm ≥0.50 mm
Laminate Requirement [0.0197 in] [0.0197 in] Units Test Method Ref. Para.
1. Peel Strength, minimum 3.9.1.1
A. Low profile copper foil and very low profile
copper foil – all copper foil >17µm [0.669 mil]. 0.70 [4.00] 0.70 [4.00]
2.4.8
B. Standard profile copper foil
N/mm [lb/in] 2.4.8.2
1. After thermal stress 0.80 [4.57] 1.05 [6.00] 3.9.1.1.1
2.4.8.3
2. At 125°C [257°F] 0.70 [4.00] 0.70 [4.00] 3.9.1.1.2
3. After process solutions 0.55 [3.14] 0.80 [4.57] 3.9.1.1.3
C. All other foil – composite AABUS AABUS
2. Volume Resistivity, minimum
A. °C [°F] - 96/35/90 [204.8/95/194] 106 –
MΩ–cm 2.5.17.1 3.11.1.3
B. After moisture resistance – 106
C. At elevated temperature E-24/125 103 103
3. Surface Resistivity, minimum
A. °C [°F] - 96/35/90 [204.8/95/194] 104 –
MΩ 2.5.17.1 3.11.1.4
B. After moisture resistance – 104
C. At elevated temperature E-24/125 103 103
4. Moisture Absorption, maximum – 0.80 % 2.6.2.1 3.12.1.1
5. Dielectric Breakdown, minimum – 40 kV 2.5.6 3.11.1.6
6. Permittivity at 1 MHz, maximum 2.5.5.2
3.11.1.1
(Laminate & prepreg as laminated) 5.4 5.4 – 2.5.5.3
3.11.2.1
2.5.5.9
7. Loss Tangent at 1 MHz, maximum 2.5.5.2
3.11.1.2
(Laminate & prepreg as laminated) 0.035 0.035 – 2.5.5.3
3.11.2.2
2.5.5.9
8. Flexural Strength, minimum
A. Length direction – 415 [60,190] N/mm2 [lb/in2] 2.4.4 3.9.1.3
B. Cross direction – 345 [50,040]
9. Flexural Strength at Elevated Temperature, length
– – N/mm2 [lb/in2] 2.4.4.1 3.9.1.4
direction, minimum
10. Arc Resistance, minimum 60 60 s 2.5.1 3.11.1.5
11. Thermal Stress 10 s at 288°C [550.4°F], minimum
A. Unetched Pass Visual Pass Visual rating 2.4.13.1 3.10.1.2
B. Etched Pass Visual Pass Visual
12. Electric Strength, minimum 3.11.1.7
30 – kV/mm 2.5.6.2
(Laminate & prepreg as laminated) 3.11.2.3
13. Flammability 3.10.2.1
V-1 minimum V-1 minimum rating UL94
(Laminate & prepreg as laminated) 3.10.1.1
14. Other – –
PREPREG REQUIREMENTS
Prepreg Requirement Specification Units Test Method Ref. Para.
1. Shelf Life, minimum (Condition 1/Condition 2) 180/90 Days AABUS 3.17
2. Reinforcement As per IPC-4412 or AABUS.
3. Volatile content maximum 0.75 % 2.3.19 3.9.2.2.8
4. Prepreg Parameters – AABUS AABUS 1.1.7
5. Flammability (as laminated) V-1 minimum rating UL94 3.10.2.1
6. Other –
*AABUS = As agreed upon between user and supplier.

71
IPC-4101A December 2001

Revision Date: December 2001

SPECIFICATION SHEET
SPECIFICATION SHEET #: IPC-4101/98
REINFORCEMENT: 1: Woven E-glass 2: N/A
RESIN SYSTEM: Primary: Epoxy
Secondary 1: Multifunctional epoxy Secondary 2: N/A
FLAME RETARDANT MECHANISM: Bromine Minimum UL94 Requirement: V-1
FILLERS: Inorganic fillers
ID REFERENCE: UL/ANSI: FR-4 MIL-S-13949: /04 - GF, GFG, GFN
ANSI: FR-4/98
GLASS TRANSITION (Tg): 150°C - 200°C
LAMINATE REQUIREMENTS
Specification Specification
<0.50 mm ≥0.50 mm
Laminate Requirement [0.0197 in] [0.0197 in] Units Test Method Ref. Para.
1. Peel Strength, minimum 3.9.1.1
A. Low profile copper foil and very low profile
copper foil – all copper foil >17µm [0.669 mil]. 0.70 [4.00] 0.70 [4.00]
2.4.8
B. Standard profile copper foil
N/mm [lb/in] 2.4.8.2
1. After thermal stress 0.80 [4.57] 1.05 [6.00] 3.9.1.1.1
2.4.8.3
2. At 125°C [257°F] 0.70 [4.00] 0.70 [4.00] 3.9.1.1.2
3. After process solutions 0.55 [3.14] 0.80 [4.57] 3.9.1.1.3
C. All other foil – composite AABUS AABUS
2. Volume Resistivity, minimum
A. C-96/35/90 106 –
MΩ–cm 2.5.17.1 3.11.1.3
B. After moisture resistance – 104
C. At elevated temperature E-24/125 103 103
3. Surface Resistivity, minimum
A. C-96/35/90 104 –
MΩ 2.5.17.1 3.11.1.4
B. After moisture resistance – 104
C. At elevated temperature E-24/125 103 103
4. Moisture Absorption, maximum – 0.80 % 2.6.2.1 3.12.1.1
5. Dielectric Breakdown, minimum – 40 kV 2.5.6 3.11.1.6
6. Permittivity at 1 MHz, maximum 2.5.5.2
3.11.1.1
(Laminate & prepreg as laminated) 5.4 5.4 – 2.5.5.3
3.11.2.1
2.5.5.9
7. Loss Tangent at 1 MHz, maximum 2.5.5.2
3.11.1.2
(Laminate & prepreg as laminated) 0.035 0.035 – 2.5.5.3
3.11.2.2
2.5.5.9
8. Flexural Strength, minimum
A. Length direction – 415 [60,190] N/mm2 [lb/in2] 2.4.4 3.9.1.3
B. Cross direction – 345 [50,040]
9. Flexural Strength at Elevated Temperature, length
– – N/mm2 [lb/in2] 2.4.4.1 3.9.1.4
direction, minimum
10. Arc Resistance, minimum 60 60 s 2.5.1 3.11.1.5
11. Thermal Stress 10 s at 288°C [550.4°F], minimum
A. Unetched Pass Visual Pass Visual rating 2.4.13.1 3.10.1.2
B. Etched Pass Visual Pass Visual
12. Electric Strength, minimum 3.11.1.7
30 – kV/mm 2.5.6.2
(Laminate & prepreg as laminated) 3.11.2.3
13. Flammability 3.10.2.1
V-1 minimum V-1 minimum rating UL94
(Laminate & prepreg as laminated) 3.10.1.1
14. Other – –
PREPREG REQUIREMENTS
Prepreg Requirement Specification Units Test Method Ref. Para.
1. Shelf Life, minimum (Condition 1/Condition 2) 180/90 Days AABUS 3.17
2. Reinforcement As per IPC-4412 or AABUS.
3. Volatile content maximum 1.5 % 2.3.19 3.9.2.2.8
4. Prepreg Parameters – AABUS AABUS 1.1.7
5. Flammability (as laminated) V-1 minimum rating UL94 3.10.2.1
6. Other –
*AABUS = As agreed upon between user and supplier.

72
 ANSI/IPC-T-50 Terms and Definitions for
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ELECTRONICS INDUSTRIES ®

Thank you for your decision to join IPC members on the “Intelligent Path to Competitiveness”!
IPC Membership is site specific, which means that IPC member benefits are available to all
individuals employed at the site designated on the other side of this application.
To help IPC serve your member site in the most efficient manner possible, please tell us what
your facility does by choosing the most appropriate member category. (Check one box only.)

Independent Printed Board Manufacturers

This facility manufactures and sells to other companies, printed wiring boards (PWBs) or other electronic
interconnection products on the merchant market. What products do you make for sale?

One-sided and two-sided rigid
Multilayer printed boards
Other interconnections

printed boards

Flexible printed boards

Name of Chief Executive Officer/President________________________________________________________

Independent Electronic Assembly EMSI Companies

This facility assembles printed wiring boards, on a contract basis, and may offer other electronic interconnection
products for sale.

Name of Chief Executive Officer/President________________________________________________________

OEM–Manufacturers of any end product using PCB/PCAs or Captive Manufacturers of PCBs/PCAs

This facility purchases, uses and/or manufactures printed wiring boards or other interconnection products for
use in a final product, which we manufacture and sell.

What is your company’s primary product line? ______________________________________________________

Industry Suppliers
This facility supplies raw materials, machinery, equipment or services used in the manufacture or assembly of
electronic interconnection products.

What products do you supply?__________________________________________________________________

Government Agencies/Academic Technical Liaisons

We are representatives of a government agency, university, college, technical institute who are directly
concerned with design, research, and utilization of electronic interconnection devices. (Must be a non-profit
or not-for-profit organization.)
 Application for Site Membership
ASSOCIATION CONNECTING
ELECTRONICS INDUSTRIES ®

Site Information:

Company Name

Street Address

City State Zip/Postal Code Country

Main Switchboard Phone No. Main Fax

Name of Primary Contact

Title Mail Stop

Phone Fax e-mail

Company e-mail address Website URL

Please Check One:

$1,000.00 Annual dues for Primary Site Membership (Twelve months of IPC
membership begins from the time the application and payment are received)

$800.00 Annual dues for Additional Facility Membership: Additional membership for a site within an
organization where another site is considered to be the primary IPC member.

$600.00** Annual dues for an independent PCB/PWA fabricator or independent EMSI provider with
annual sales of less than $1,000,000.00. **Please provide proof of annual sales.

$250.00 Annual dues for Government Agency/not-for-profit organization

TMRC Membership
Please send me information about membership in the Technology Market
Research Council (TMRC)

Payment Information:
Enclosed is our check for $________________
Please bill my credit card: (circle one) MC AMEX VISA DINERS
Card No.___________________________________________________________Exp date_______________
Authorized Signature
________________________________________________________________________________

Mail application with check or money order to:

IPC
Dept. 77-3491
Chicago, IL 60678-3491
Please attach business card
Fax/Mail application with credit card payment to:
of primary contact here
IPC
2215 Sanders Road
Northbrook, IL 60062-6135
Tel: 847 509.9700
Fax: 847 509.9798
http://www.ipc.org
02/01
 ASSOCIATION CONNECTING
ELECTRONICS INDUSTRIES ®

Standard Improvement Form IPC-4101A

The purpose of this form is to provide the Individuals or companies are invited to If you can provide input, please complete
Technical Committee of IPC with input submit comments to IPC. All comments this form and return to:
from the industry regarding usage of will be collected and dispersed to the IPC
the subject standard. appropriate committee(s). 2215 Sanders Road
Northbrook, IL 60062-6135
Fax 847 509.9798
E-mail: answers@ipc.org

1. I recommend changes to the following:

Requirement, paragraph number
Test Method number , paragraph number

The referenced paragraph number has proven to be:

Unclear Too Rigid In Error
Other

2. Recommendations for correction:

3. Other suggestions for document improvement:

Submitted by:

Name Telephone

Company E-mail

Address

City/State/Zip Date
ASSOCIATION CONNECTING
ELECTRONICS INDUSTRIES ®
ISBN #1-580982-78-6 2215 Sanders Road, Northbrook, IL 60062-6135
Tel. 847.509.9700 Fax 847.509.9798
www.ipc.org