Superconducting Transistor Switching to Eliminate Gate Leakage
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Solution Overview
Problem
Conventional semiconductor-based transistors face performance limitations due to issues like gate oxide leakage current, and there is a need for more efficient methods to switch and amplify electrical signals effectively.
Innovation Solution
The development of transistor devices utilizing a combination of semiconducting and superconducting wires, where the superconducting wire is electrically isolated from the semiconducting wire, and transitions between superconducting and non-superconducting states to control current flow, leveraging resistive heat generation and electromagnetic fields to switch between on and off states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional semiconductor-based transistors are used, then current switching and amplification can be achieved, but gate oxide leakage current limits performance
Solution Approach 1:
The patent changes the operating temperature parameter by cooling the semiconductor material below its critical temperature to achieve the freeze-out effect, where charge carriers are frozen out and electrical conductivity drops dramatically, effectively eliminating leakage current while maintaining controllable switching behavior
Solution Approach 2:
The invention uses composite material structures combining superconducting materials (for the gate) with semiconducting materials (for the channel), creating a hybrid system that leverages the zero-resistance property of superconductors to control the freeze-out state of the semiconductor, achieving both low power consumption and high reliability
2Productivity
If device sizes decrease to improve integration, then more transistors can be packed, but performance is limited by leakage and other scaling issues
Solution Approach 1:
By changing the temperature parameter to cryogenic levels, the patent enables scaled device operation where the freeze-out effect dominates over leakage mechanisms, allowing high-density integration without the performance degradation typically associated with miniaturization
3Productivity
If superconducting wire is used as gate to control current flow, then switching efficiency is improved, but electrical isolation between superconducting and semiconducting wires must be maintained
Solution Approach 1:
The patent introduces an intermediary layer (such as a thin insulating oxide layer or vacuum gap) between the superconducting gate wire and the semiconducting channel, which provides electrical isolation while allowing thermal coupling to enable the freeze-out effect, thus maintaining switching efficiency without direct electrical contact
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
This approach enhances the efficiency and effectiveness of transistor functionality by allowing precise control of current flow through temperature and voltage-induced transitions, overcoming the limitations of conventional semiconductor-based transistors.
Implementation Method 1
the superconducting wire transitions to a non-superconducting state. During the transition, the superconducting wire generates heat sufficient to heat the semiconducting wire above the critical temperature for current flow
Implementation Method 2
a voltage is introduced to the semiconducting wire. The voltage generates an electromagnetic field that lowers a current threshold for the superconducting wire
Data Source
AI summary
The various embodiments described herein include methods, devices, and systems for fabricating and operating transistors. In one aspect, a transistor includes: (1) a semiconducting component configured to operate in an on state at temperatures above a semiconducting threshold temperature; and (2) a superconducting component configured to operate in a superconducting state while: (a) a temperature of the superconducting component is below a superconducting threshold temperature; and (b) a first current supplied to the superconducting component is below a current threshold; where: (i) the semiconducting component is located adjacent to the superconducting component; and (ii) in response to a first input voltage, the semiconducting component is configured to generate an electromagnetic field sufficient to lower the current threshold such that the first current exceeds the lowered current threshold, thereby transitioning the superconducting component to a non-superconducting state.