Storage Device Switching Element Segmentation for Current Control
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Solution Overview
Problem
Cross-point type storage devices face challenges in reducing the load on switching elements, which can lead to excessive electric current flow and potential damage due to high on/off ratios.
Innovation Solution
The storage device incorporates a switching element with a first portion that switches from a high-resistance state to a low-resistance state at a first threshold voltage and a second portion that switches at a higher second threshold voltage, reducing the load by controlling the electric current increase in a stepwise manner.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a switching element with high on/off ratio is used to select memory cells, then the selection capability is improved, but excessive electric current flows through the switching element causing potential damage
Solution Approach 1:
The switching element is divided into two portions: a first portion that switches at a first threshold voltage and a second portion that switches at a second threshold voltage higher than the first. This segmentation allows the switching element to control current flow in a stepwise manner, preventing excessive current while maintaining high on/off ratio for memory cell selection.
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 effectively reduces the load on switching elements while maintaining a sufficient on/off ratio, preventing rapid current increases and ensuring long-term functionality by stabilizing the amorphous structure and preventing leakage currents.
Implementation Method 1
The first portion is provided between the first conductor and the second conductor, and has a first threshold voltage value at which the resistance value changes
Implementation Method 2
The second portion is provided between the first conductor and the first portion and/or between the second conductor and the first portion, and has a second threshold voltage value at which the resistance value changes and which is higher than the first threshold voltage value
Data Source
AI summary
A storage device includes a first conductor, a second conductor, a variable resistance layer, a first portion, and a second portion. The variable resistance layer connects with the first conductor or the second conductor. The first portion is provided between the first conductor and the second conductor, and has a first threshold voltage value at which the resistance value changes. The second portion is provided between the first conductor and the first portion and/or between the second conductor and the first portion, and has a second threshold voltage value at which the resistance value changes and which is higher than the first threshold voltage value.