Magnetic Memory Device Tilted Third Portion Storage Density

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Solution Overview

Problem

Current magnetic memory devices have limitations in increasing storage density due to the design constraints of their magnetic and nonmagnetic layers, which affect the efficiency of information storage and retrieval operations.

Innovation Solution

The magnetic memory device incorporates a first magnetic member with a tilted third portion and a nonmagnetic layer between the magnetic layer and the third portion, allowing for a compact design that enhances storage density by optimizing the surface area and current density during write and read operations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If conventional magnetic memory device design is used, then device structure is simple, but storage density cannot be increased

Engineering Contradiction:

Improvestorage densityVSAvoiddevice structure

Core Design Contradiction:

Quantity of substanceVSDevice complexity

Solution Approach 1:

The patent introduces a tilted third portion that extends in a direction different from the first direction (along which the first extension portion extends). This adds a dimensional component to the magnetic member structure, allowing increased storage density by utilizing spatial arrangement in multiple directions rather than solely along a single linear extension.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The third portion is designed with a tilted configuration relative to the first direction, creating an asymmetric structure. This asymmetric arrangement optimizes the surface area and current density distribution during write and read operations, thereby enhancing storage density while maintaining manageable device complexity.

Inventive Principle:

Principle #4Asymmetry

2Quantity of substance

If conventional magnetic memory device design is used, then manufacturing process is simple, but storage density is limited

Engineering Contradiction:

Improvestorage densityVSAvoidmanufacturing process

Core Design Contradiction:

Quantity of substanceVSEase of manufacture

Solution Approach 1:

The magnetic member is segmented into distinct portions: a first extension portion with a first portion and second portion, and a separate third portion connected to the second portion. This segmentation allows each portion to be optimized independently for storage density while maintaining a structured manufacturing approach where each segment can be formed through controlled deposition or patterning processes.

Inventive Principle:

Principle #1Segmentation

3Use of energy by moving object

If conventional magnetic memory device design is used, then operating current is high, but device simplicity is maintained

Engineering Contradiction:

Improveoperating currentVSAvoiddevice structure

Core Design Contradiction:

Use of energy by moving objectVSDevice complexity

Solution Approach 1:

The tilted third portion creates an asymmetric magnetic structure that optimizes the distribution of current density during write and read operations. This asymmetric configuration enhances the efficiency of spin transfer torque or spin-orbit torque effects, reducing the operating current required for magnetic switching while maintaining a relatively simple overall device structure.

Inventive Principle:

Principle #4Asymmetry

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 increases storage density while reducing the operating current required for shift operations, thereby improving the efficiency and reliability of information storage and retrieval processes.

Implementation Method 1

a first nonmagnetic layer provided between the first magnetic layer and the at least a portion of the third portion

Methodology Applied

Scientific EffectMagnetic field isolation: Magnetism

Implementation Method 2

allowing for a compact design that enhances storage density by optimizing the surface area and current density during write and read operations

Methodology Applied

Scientific EffectCurrent density optimization: Electrical Resistance

Data Source

PatentUS10304902B2Magnetic memory device

Publication Date: 2019.05.28 KIOXIA CORP

AI summary

According to one embodiment, a magnetic memory device includes a first magnetic member, a first magnetic layer, and a first nonmagnetic layer. The first magnetic member includes a first extension portion and a third portion. The first extension portion extends along a first direction and includes a first portion and a second portion. The third portion is connected to the second portion. A direction from the first portion toward the second portion is aligned with the first direction. At least a portion of the third portion is tilted with respect to the first direction. The first nonmagnetic layer is provided between the first magnetic layer and the at least a portion of the third portion. The first nonmagnetic layer is provided along the at least a portion of the third portion and is tilted with respect to the first direction.