Magnetic Memory Devices With Insulated SOT Lines
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Solution Overview
Problem
Existing magnetic memory devices face challenges in achieving high integration and low power consumption while maintaining stable data storage and reducing defects, particularly due to the risk of electrical shorts and operational errors associated with spin-orbit torque lines in contact with the tunnel barrier layer.
Innovation Solution
The magnetic memory device incorporates a magnetic tunnel junction pattern with a free layer, tunnel barrier layer, and pinned layer stacked sequentially, along with first and second spin-orbit torque lines in contact with the sidewalls of the free layer, ensuring these lines are spaced apart from the tunnel barrier layer to prevent shorts and improve operational stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If spin-orbit torque lines are placed in contact with the tunnel barrier layer to enable write operations, then write capability is achieved, but electrical shorts and operational errors occur
Solution Approach 1:
The patent introduces an insulating layer as an intermediary between the spin-orbit torque line and the tunnel barrier layer. This insulating layer enables the spin-orbit torque line to be positioned close to the magnetic tunnel junction for effective write operations while preventing direct electrical contact that would cause shorts and operational errors.
2Productivity
If device dimensions are reduced to achieve high integration, then integration density is improved, but defect occurrence increases
Solution Approach 1:
The insulating layer serves as a protective intermediary that becomes increasingly important as device dimensions are reduced. It provides a reliable isolation mechanism that prevents defects and electrical shorts even when the overall device size is minimized for high integration density.
Solution Approach 2:
The insulating layer is positioned in advance between the spin-orbit torque line and the tunnel barrier layer to prevent potential electrical shorts before they can occur. This proactive protective measure reduces defect occurrence and improves manufacturing yield in highly integrated devices.
3Power
If spin-orbit torque lines are positioned close to the magnetic tunnel junction for efficient writing, then write efficiency is improved, but electrical shorts occur
Solution Approach 1:
The insulating layer acts as a mediator that allows the spin-orbit torque line to be positioned in close proximity to the magnetic tunnel junction for efficient magnetic field coupling and write operations, while simultaneously preventing harmful electrical shorts between the conductive spin-orbit torque line and the tunnel barrier layer.
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 enhances the reliability and stability of data storage by reducing the occurrence of electrical shorts and process defects, allowing for high-degree freedom in write operations and stable data storage, thereby improving the overall performance of magnetic memory devices.
Implementation Method 1
a first spin-orbit torque (SOT) line in contact with a first sidewall of the free layer of the magnetic tunnel junction pattern
Data Source
AI summary
Provided are magnetic memory devices and method of fabricating the same. The magnetic memory device includes a magnetic tunnel junction pattern disposed on a substrate and including a free layer, a tunnel barrier layer and a pinned layer which are sequentially stacked, and a first spin-orbit torque (SOT) line being in contact with a first sidewall of the free layer of the magnetic tunnel junction pattern.