Programmable Gate Transistors for Post-Fabrication Threshold Tuning
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Solution Overview
Problem
Conventional methods for adjusting threshold voltage of transistors after IC fabrication are complex and impractical, limiting adaptability and efficiency in power consumption, performance, and reliability across varying temperatures and manufacturing processes.
Innovation Solution
Incorporation of programmable gates in transistors with a programmable insulator material, such as ferroelectric or antiferroelectric materials, allowing dynamic threshold voltage tuning through external stimuli, enabling post-fabrication adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional methods are used to adjust threshold voltage after IC fabrication, then threshold voltage can be modified, but the process becomes complex and impractical
Solution Approach 1:
The gate electrode is divided into two independent segments: a fixed gate electrode and a programmable gate electrode. The programmable gate electrode can be independently controlled to adjust threshold voltage, while the fixed gate electrode maintains basic transistor operation. This segmentation enables post-fabrication threshold voltage tuning without complex external circuits.
Solution Approach 2:
The invention changes the electrical parameters of the transistor by applying voltages to the programmable gate electrode. By varying the voltage on this electrode, the threshold voltage can be dynamically adjusted to compensate for manufacturing variations and aging effects, simplifying the adjustment process compared to conventional methods.
2Productivity
If transistor size is scaled down to increase density, then capacity increases, but performance optimization becomes increasingly significant and difficult
Solution Approach 1:
The gate electrode segmentation allows independent control of threshold voltage even in scaled-down transistors. This enables performance optimization through electrical tuning rather than requiring complex manufacturing process adjustments, making it feasible to maintain performance control as density increases through scaling.
Solution Approach 2:
The programmable gate electrode introduces dynamic control capability to scaled-down transistors. Threshold voltage can be adjusted in real-time to optimize performance for different operating conditions, compensating for the reduced margin for error that comes with smaller device dimensions.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances power efficiency, performance, and reliability by dynamically controlling power consumption and compensating for aging and manufacturing variations, improving yield and thermal management.
Implementation Method 1
a programmable insulator material, such as ferroelectric or antiferroelectric materials, allowing dynamic threshold voltage tuning through external stimuli
Implementation Method 2
a programmable insulator material, such as ferroelectric or antiferroelectric materials, allowing dynamic threshold voltage tuning through external stimuli
Data Source
AI summary
Disclosed herein are transistor arrangements with programmable gates for threshold voltage tuning, and related IC structures, devices, and techniques. As an example, a transistor includes a channel material; a first gate electrode material; a first gate insulator, wherein the first gate insulator is between the channel material and the first gate electrode material; a second gate insulator, wherein the first gate electrode material is between the first gate insulator and the second gate insulator; and a second gate electrode material, wherein the second gate insulator is between the first gate electrode material and the second gate electrode material. Together, the first gate insulator and the first gate electrode material may form the main gate for turning the transistor on and off, while the second gate insulator and the second gate electrode material may form a programmable gate for threshold voltage tuning of the transistor.