Electrochemical Transistor with Solid Electrolyte Layer
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Solution Overview
Problem
Existing transistors face limitations in charge mobility and channel control, particularly when miniaturized, due to short channel effects and inadequate gate voltage control, which restricts their performance in high-image-quality displays.
Innovation Solution
A transistor design that operates without electron-based mobility, featuring a channel forming layer, a solid electrolyte layer, and an active metal layer capable of oxidation-reduction reactions, allowing for channel switching between the channel forming layer and the solid electrolyte layer, with a thin channel forming layer and electrochemically active metals like copper, silver, and nickel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a thin channel forming layer is used to improve gate control, then gate voltage control is improved, but current path formation becomes difficult
Solution Approach 1:
The patent introduces a solid electrolyte layer as an intermediary between the gate and the active metal layer. This layer enables ion transport that facilitates current path formation while maintaining the thin channel forming layer structure for improved gate control. The solid electrolyte acts as a mediator that resolves the conflict between thin-layer control and sufficient current conduction.
Solution Approach 2:
The patent changes the operational parameters by using electrochemical reactions instead of traditional electron-based conduction. By applying gate voltages that drive ion migration through the solid electrolyte, the system achieves both thin-layer control and reliable current path formation through parameter transformation from electronic to ionic conduction mechanisms.
2Ease of operation
If conventional charge-based operation is used, then transistor switching is achieved, but short channel effects and poor gate control occur when miniaturized
Solution Approach 1:
The patent substitutes the traditional charge-based electronic conduction mechanism with an electrochemical ion transport mechanism. Instead of relying on electron flow that suffers from short channel effects, the system uses ion migration through the solid electrolyte layer, which is less susceptible to miniaturization effects and provides better gate control.
Solution Approach 2:
The patent fundamentally changes the operational parameter from electronic charge transport to ionic transport. This parameter change enables transistor switching functionality while eliminating the short channel effects that plague conventional miniaturized transistors, as ion migration is not subject to the same scaling limitations.
3Speed
If high charge mobility is required for high image quality displays, then poly-Si TFT or metal oxide TFT is used, but manufacturing complexity and cost increase
Solution Approach 1:
The patent changes the conduction mechanism from electronic to ionic, which fundamentally alters the mobility parameter. Instead of seeking higher electron mobility through complex materials like poly-Si or metal oxides, the system achieves effective charge transport through ion migration, simplifying the manufacturing process while maintaining performance suitable for high-image-quality displays.
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 design enables efficient channel switching and high-performance operation without electron mobility, addressing short channel effects and gate voltage control issues, while allowing for low-cost manufacturing and integration of both transistor and memory functions.
Implementation Method 1
an active metal layer including an electrochemically active metal and capable of enabling channel switching by using an oxidation-reduction reaction of the electrochemically active metal
Implementation Method 2
by diffusion of the active metal through the solid electrolyte layer according to a gate voltage applied to the gate
Implementation Method 3
a solid electrolyte layer between the channel forming layer and the gate
Data Source
AI summary
A transistor includes a channel forming layer on a substrate, a gate on the channel forming layer and including an electrochemically indifferent metal, a solid electrolyte layer between the channel forming layer and the gate, the solid electrolyte layer is formed as a stack structure with the gate on the channel forming layer, an active metal layer including an electrochemically active metal capable of enabling channel switching by using an oxidation-reduction reaction of the electrochemically active metal so that the active metal layer forms a metal channel in a channel region between the channel forming layer and the solid electrolyte layer, and a source and a drain electrically connected to the active metal layer.