Magnetic Memory Device Potential-Controlled Magnetization
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Solution Overview
Problem
Magnetic memory devices face instability in operations due to limited control over magnetization orientation, leading to unstable selection and unselection of memory cells, and require complex two-stage programming processes.
Innovation Solution
A magnetic memory device design that includes a first member with multiple regions and magnetic layers, where the controller sets specific electric potentials across intermediate layers to control magnetization orientation without altering the current direction, enabling stable operations and high-speed one-stage programming.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional magnetic memory devices are used, then magnetization orientation can be controlled, but operational stability deteriorates due to limited control and complex two-stage programming
Solution Approach 1:
The patent changes the electrical potential parameter of the first magnetic layer to control magnetization orientation. By applying different electrical potentials (first electrical potential for first information, second electrical potential for second information), the magnetization can be stably controlled without complex two-stage programming processes, thereby improving operational stability while reducing programming complexity
Solution Approach 2:
The patent segments the magnetic memory device into distinct functional regions: a first member with multiple regions (first, second, third regions), magnetic layers (first, second magnetic layers), and nonmagnetic layers. This segmentation allows independent control of different memory cells through selective application of electrical potentials to specific magnetic layers, enabling stable operation with simplified programming
2Productivity
If magnetization orientation is controlled to improve memory cell selection, then programming speed increases, but operational stability deteriorates due to limited control precision
Solution Approach 1:
The patent uses electrical potential as a control parameter for magnetization orientation. By setting the first magnetic layer to different electrical potentials (first or second electrical potential), the magnetization can be precisely and rapidly controlled, achieving both high programming speed and stable memory cell selection
Solution Approach 2:
The patent introduces a nonmagnetic layer between the first and second magnetic layers, which acts as an intermediary to mediate the interaction between magnetic layers. This allows independent control of each magnetic layer's magnetization through electrical potential application, improving both programming speed and selection stability
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
The design achieves stable and efficient programming of memory cells with improved controllability and reduced complexity, allowing for high-speed operations with increased stability and reduced operational margins.
Implementation Method 1
stable operations are desirable in a magnetic memory device... the controller is configured to program first information to the first memory cell by setting the first magnetic layer to a first electric potential while supplying a first current to the first member
Data Source
AI summary
According to one embodiment, a magnetic memory device includes a first member, a first memory cell, and a controller. The first member includes first, second, and third regions. The first memory cell includes first and second magnetic layers, and a first nonmagnetic layer. The second magnetic layer is provided between the third region and the first magnetic layer. The first nonmagnetic layer is provided between the first and second magnetic layers. The controller is electrically connected to the first and second regions, and the first magnetic layer. The controller programs first information to the first memory cell by setting the first magnetic layer to a first electric potential. The controller programs second information to the first memory cell by setting the first magnetic layer to a second electric potential. The second electric potential is different from the first electric potential. The second information is different from the first information.