Additively Manufactured Resistive Switch for Stray Field Tolerance
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Solution Overview
Problem
Traditional non-volatile memory and solid-state electrical switch technologies are limited by their susceptibility to stray electric and magnetic fields, which can disrupt or damage the desired electrical charge and magnetic polarization distributions, and are challenging to miniaturize due to inherent field interactions.
Innovation Solution
The development of additively manufactured resistive switches with a platinum layer, a silver iodide electrolyte layer, and silver electrodes, which allow for the growth and removal of silver filaments to establish and break electrical connections, enabling efficient transitions between high and low conductivity states and being tolerant to stray fields.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional non-volatile memory and solid-state electrical switch technologies are used, then electrical charge and magnetic polarization distributions can be managed, but these technologies are susceptible to stray electric and magnetic fields that disrupt or damage the desired distributions
Solution Approach 1:
The patent replaces traditional charge-based and magnetic polarization-based switching mechanisms with an ionic conduction mechanism. The resistive switch uses ion migration through a solid electrolyte layer to form conductive filaments, substituting the mechanical/electromagnetic management of charge distributions with an ionic transport process that is inherently more resistant to stray electric and magnetic fields.
Solution Approach 2:
The patent changes the fundamental operating parameter from electrical charge management to ionic conduction. By using a solid electrolyte layer and enabling ion migration under applied voltage, the system transitions from managing electrical charge distributions to managing ionic flux, which operates under different physical principles that are less susceptible to stray field interference.
2Length of moving object
If electrical charge and magnetic polarization distributions are used for switching, then the desired electrical charge or magnetic polarizations can be established, but micronization is limited by inherent electric and magnetic fields that cause undesired reordering
Solution Approach 1:
The patent replaces charge-based and magnetic polarization-based mechanisms with ionic conduction through a solid electrolyte. This substitution enables miniaturization because ionic filaments can be formed in highly localized regions without the long-range field interactions that plague charge and magnetic polarization distributions at small scales.
Solution Approach 2:
The solid electrolyte layer acts as an intermediary medium that enables localized ionic transport. This intermediary layer confines the ionic conduction path, allowing precise spatial control of the conductive filament formation and preventing undesired reordering that would occur with inherent electric and magnetic fields in traditional approaches.
3Length of moving object
If additively manufactured resistive switches with silver iodide electrolyte layer are used, then miniaturization potential and current density are improved, but extrusion-based additive manufacturing process is required
Solution Approach 1:
The extrusion-based additive manufacturing process enables local quality control by depositing the silver iodide electrolyte material precisely where needed. This layer-by-layer deposition allows for localized formation of the electrolyte layer with controlled thickness and geometry, enabling miniaturization while maintaining manufacturing feasibility through digital design control.
Solution Approach 2:
The additive manufacturing process is self-service in that the digital model directly guides the material deposition without requiring complex tooling or assembly fixtures. The extrusion process automatically builds the electrolyte layer structure from the digital design, simplifying the manufacturing process despite the specialized material requirements.
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
These switches offer enhanced miniaturization potential, low power requirements, high speed transitions, high endurance, and radiation hardness, with improved current density and resistance to undesired field effects, making them suitable for neuromorphic computing and non-volatile memory applications.
Implementation Method 1
growing a silver filament by silver ion migration in the silver iodide electrolyte layer
Implementation Method 2
Using extrusion-based additive manufacturing techniques to form the solid-state AgI electrolyte layer in the resistive switches promote ionic conductivities within the electrolyte layer
Data Source
AI summary
An resistive switch having a first platinum layer, an electrolyte layer that is formed by extrusion based additive manufacturing, a silver layer, and a second platinum layer, and methods of manufacturing and using the resistive switch.