Resistance Variable Element Conductor Electric Field Switching Current
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Solution Overview
Problem
Current semiconductor devices face challenges in reducing switching current while maintaining efficient resistance switching, particularly in miniaturized electronic devices with high performance and low power consumption requirements.
Innovation Solution
The implementation of a semiconductor memory device with a resistance variable element and a conductor that applies an electric field to reduce the spatial spread of current, allowing for a higher current density and lower switching current through the use of a conductor arranged adjacent to the resistance variable element, which can be made of materials like metal, metal nitride, or doped silicon, and can operate independently or in conjunction with the electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a conventional resistance variable element is used without additional conductors, then the structure is simple, but the switching current is high and power consumption is excessive
Solution Approach 1:
A conductor is introduced as an intermediary element between the electrodes and the resistance variable element. This conductor applies a lateral electric field that mediates the current flow through the resistance variable element, enabling lower switching currents while maintaining the resistance switching function. The conductor acts as a field-applying intermediary that modifies the electrical characteristics without becoming part of the direct current path.
Solution Approach 2:
The patent introduces a lateral dimension for electric field application by placing the conductor adjacent to and parallel with the resistance variable element. Instead of applying voltage only in the vertical direction (between top and bottom electrodes), the conductor applies an electric field in the lateral direction, creating a three-dimensional field configuration that concentrates current flow and reduces the total switching current required.
2Power
If the current flow area in the resistance variable element is increased, then the switching current is higher, but the current density is lower which reduces switching efficiency
Solution Approach 1:
The conductor creates a non-uniform electric field distribution across the resistance variable element, with the highest field strength located directly beneath the conductor. This local quality variation causes current to concentrate in a specific region (local area) rather than distributing uniformly throughout the entire element. The local high current density region provides efficient switching while the overall current can be kept lower.
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 reduces the amount of current needed for switching operations, enhancing power efficiency and performance in electronic devices by concentrating the current flow within a local area of the resistance variable element.
Implementation Method 1
a conductor arranged adjacent to the resistance variable element and providing an electric field to the resistance variable element
Data Source
AI summary
An electronic device includes a first electrode, a second electrode spaced apart from the first electrode, a resistance variable element interposed between the first electrode and the second electrode, and a conductor arranged at least one of a first side and a second side of the resistance variable element to apply an electric field to the resistance variable element while being spaced apart from the resistance variable element, the first side facing the second side.