Exploring FINFET
Roll no-72
sub-VLSI
prof. A.N.BHATT
Introduction
FinFET (Fin Field Effect Transistor) is a modern 3D transistor design
used to overcome the limitations of traditional MOSFETs. It offers
better control over the channel, reduces leakage current, and supports
scaling to smaller technology nodes, making it ideal for today’s low-
power, high-performance electronics.
FinFET technology emerged as a scalable solution that supports Moore’s
Law even in advanced nodes.It is now widely adopted by companies
like Intel, TSMC, and Samsung for producing high-speed, energy-
efficient processors.
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Need for FinFET Technology
As MOSFETs are scaled down to nanometer dimensions, they experience
various issues such as short channel effects, high leakage current, and poor
electrostatic control.
In smaller nodes, the distance between source and drain reduces, weakening the
gate's ability to control the channel.
FinFETs solve this by providing a multi-gate design, which strengthens gate
control and suppresses leakage.
Thus, FinFETs are a necessary advancement for reliable transistor operation in
modern VLSI systems
Feature Planar MOSFET FinFET
Gate Control One side only Multi-side (3D)
Leakage Current High in small nodes Very low
Channel Control Weak below 22nm Strong and stable
Power Efficiency Less efficient High efficiency
Fabrication Simple Complex but scalable
FinFET Structure and
Operation
The fin is the conducting channel, shaped vertically on the
substrate.
A wrap-around gate controls current from multiple sides of the fin.
Effective channel width is controlled by fin height and number of
fins.
Stronger gate control = better ON/OFF current ratio (Ion/Ioff).
Enables low-voltage, high-frequency operation with reduced power
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Working of FinFET
Gate voltage controls current flow through the fin channel for better transistor
operation.
The 3D gate structure creates a stronger electric field, enhancing channel
control.
This improves switching with higher drive current (Ion) and reduces leakage
current (Ioff).
FinFETs are ideal for low-voltage, energy-efficient, and high-performance
applications.
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Applications of FinFET
Used in smartphones, CPUs, GPUs, and SoCs.
Essential for AI, 5G, and IoT devices.
Adopted by Intel, TSMC, AMD, Apple, and others.
Key in 7nm, 5nm, and 3nm fabrication technologies.
Supports high-density, low-power IC designs.
Conclusion
FinFET solves scaling issues of MOSFETs in nano dimensions.
Offers better control, reduced leakage, and high performance.
Forms the base of modern semiconductor devices.
Crucial for energy-efficient and compact electronics.
Future: GAA FETs and nanosheet transistors
THANK YOU
Refrences:
www.wikipidia.com
goggle.com
openai.com