Magnetic Storage Selector Heat Insulation for Data Retention
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Solution Overview
Problem
Magnetic storage devices face challenges in maintaining the retention property of magnetoresistive effect elements due to heat generated during write and read operations, which can cause data reversal and degradation if not properly managed.
Innovation Solution
The magnetic storage device incorporates a heat insulation material with a thermal conductivity of 5 W/mK or lower between the selector and the magnetoresistive effect element to prevent heat transfer, while using higher thermal conductivity materials for heat radiation to manage heat generated by the selector, thereby maintaining the retention property of the magnetoresistive effect elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If heat insulation material with low thermal conductivity is used between selector and magnetoresistive effect element, then temperature increase of magnetoresistive effect element is prevented, but heat dissipation from selector becomes insufficient
Solution Approach 1:
A heat insulation layer is introduced as an intermediary between the selector and the magnetoresistive effect element. This layer has thermal conductivity of 5 W/mK or lower, acting as a thermal barrier that prevents heat from the selector from reaching the magnetoresistive effect element, thereby protecting the storage element from temperature-induced data reversal while allowing the selector to operate at higher temperatures
Solution Approach 2:
The heat insulation layer is selectively positioned only between the selector and the magnetoresistive effect element, creating localized thermal management. This allows different regions of the device to have different thermal properties - the interface region is thermally isolated while other regions can dissipate heat as needed
2Reliability
If heat insulation material is used to prevent heat transfer, then data retention is maintained, but device complexity increases due to additional material layer
Solution Approach 1:
The heat insulation layer serves multiple functions simultaneously: it acts as a thermal barrier to prevent heat transfer from the selector, provides physical separation between the selector and magnetoresistive effect element, and can serve as part of the overall device architecture. This multi-functionality reduces the need for additional separate components
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 prevents the temperature of the magnetoresistive effect elements from increasing, thereby maintaining data retention and preventing data reversal, even when the selector generates significant heat during operations.
Implementation Method 1
a heat insulation material with a thermal conductivity of 5 W/mK or lower between the selector and the magnetoresistive effect element to prevent heat transfer
Data Source
AI summary
According to one embodiment, a magnetic device includes a first memory cell including a magnetoresistive effect element, a selector, and a first barrier material disposed between the selector and the magnetoresistive effect element, wherein the first barrier material has a thermal conductivity of 5 W/mK or lower.