Solid Electrolyte Switch with Metal Diffusion Barrier
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Solution Overview
Problem
The existing two-terminal solid electrolyte switches face issues with high power consumption during state transitions and potential metal ion leakage, which can adversely affect neighboring elements in integrated circuits.
Innovation Solution
A three-terminal solid electrolyte switch is designed with a gate electrode capable of supplying metal ions, and a metal diffusion prevention film is used to cover non-contacting areas of the solid electrolyte layer, preventing ion leakage and diffusion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a two-terminal solid electrolyte switch is used, then the device structure is simple, but metal ions leak into surrounding regions affecting neighboring elements
Solution Approach 1:
The solid electrolyte layer is divided into multiple regions: a first region contacting the first electrode, a second region contacting the second electrode, and a third region between them. This segmentation allows selective placement of metal diffusion prevention films in the third region, preventing ion leakage while maintaining structural simplicity.
Solution Approach 2:
A metal diffusion prevention film is introduced as an intermediary layer between the solid electrolyte layer and surrounding regions. This film acts as a barrier that prevents metal ions from leaking into neighboring elements while allowing the solid electrolyte to function normally.
2Ease of operation
If voltage is applied to transition from OFF to ON state, then the switching function is achieved, but large current flows resulting in high power consumption
Solution Approach 1:
The patent applies local quality by creating a specific structural configuration where the solid electrolyte layer has different functional regions, and metal diffusion prevention films are selectively placed. This local structural optimization enables controlled ion transport that reduces current flow during switching while maintaining the switching function.
3Use of energy by moving object
If a three-terminal solid electrolyte switch is used, then power consumption is reduced, but metal ions may leak from the solid electrolyte layer into surrounding regions
Solution Approach 1:
The solid electrolyte layer is segmented into three distinct regions (first, second, and third regions) with different functional requirements. The metal diffusion prevention film is strategically placed to cover the third region and extend toward the first and second regions, providing targeted protection against ion leakage while preserving the low power consumption characteristics of the three-terminal design.
Solution Approach 2:
The metal diffusion prevention film serves as an intermediary barrier that selectively blocks metal ion diffusion paths from the solid electrolyte layer into surrounding regions, while allowing the three-terminal switching operation to proceed with minimal current flow.
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 configuration allows for controlled resistance switching with minimal current flow and prevents metal ion leakage, ensuring stable operation and integration with other elements in integrated circuits.
Implementation Method 1
a third electrode that is provided in contact with the solid electrolyte layer and that can supply metal ions
Implementation Method 2
a metal diffusion prevention film that covers points of the surface of the solid electrolyte layer that do not contact any of the first electrode, second electrode, and third electrode
Implementation Method 3
The solid electrolyte switch is an element for controlling the electrical resistance between the two electrodes by applying voltage between these two electrodes to bring about an oxidation-reduction reaction of the metal ions in the solid electrolyte
Implementation Method 4
the metal ions in the solid electrolyte at one of the electrodes (the cathode side) to which a relative negative voltage is applied are reduced and precipitate as metal atoms. The continuation of the reduction reaction causes the precipitated metal to grow toward the other electrode (the anode) until a metal bridge is finally formed
Data Source
AI summary
The switching element of the present invention is of a configuration that includes: a first electrode (14) and a second electrode (15) provided separated by a prescribed distance; a solid electrolyte layer (16) provided in contact with the first electrode (14) and the second electrode (15); a third electrode (18) that can supply metal ions and that is provided in contact with the solid electrolyte layer (16); and a metal diffusion prevention film (17) that covers points of the surface of the solid electrolyte layer (16) that are not in contact with the first electrode (14), the second electrode (15) or the third electrode (18). This configuration prevents the adverse effect of metal ions upon other elements.