Variable Resistance Memory With MTJ Structure
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Solution Overview
Problem
Current electronic devices face challenges in achieving miniaturization, low power consumption, high performance, and multi-functionality while effectively storing information, particularly in memory circuits that require advanced resistance switching mechanisms.
Innovation Solution
The integration of a semiconductor memory with a variable resistance structure and a Magnetic Tunnel Junction (MTJ) structure, utilizing conductive filaments and spin transfer torque to achieve multiple resistance states, allowing for efficient data storage and improved integration in electronic devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a conventional memory structure is used, then the device can store information, but the device size cannot be sufficiently miniaturized and integration density is limited
Solution Approach 1:
The patent combines variable resistance structure and MTJ structure into a single integrated memory cell, merging two separate functional elements (resistance switching and magnetic state storage) into one unified structure. This integration allows simultaneous achievement of miniaturization and high integration density without requiring separate memory cells for each function.
Solution Approach 2:
The memory structure employs composite material layers including tunnel dielectric layer, magnetic layers, and variable resistance materials, creating a multi-material stack that enables both compact form factor and high functionality. The composite structure allows multiple physical effects to coexist in a small volume, improving integration density while reducing device size.
2Device complexity
If simple resistance switching is used, then the structure is simple, but multiple resistance states cannot be achieved for efficient data storage
Solution Approach 1:
The patent uses composite material structures including tunnel dielectric layers and magnetic layers combined with variable resistance materials to create multiple stable resistance states. This composite approach enables reliable multi-level data storage (beyond simple binary states) while maintaining a relatively compact and integrated structure, balancing complexity and functionality.
Solution Approach 2:
The memory structure exploits changes in multiple physical parameters simultaneously - resistance, magnetization direction, and conductive filament formation/dissipation - to create distinct, reliably distinguishable resistance states. By controlling these parameters through applied voltage and current, the system achieves multiple stable states for efficient data storage without excessive structural complexity.
3Productivity
If high performance memory is implemented, then data storage efficiency improves, but power consumption increases
Solution Approach 1:
The variable resistance structure utilizes self-organizing conductive filament formation and dissolution through applied voltage pulses, where the material itself performs the switching action without requiring additional active control circuits. This self-service mechanism reduces power consumption while maintaining high data storage efficiency, as the resistance switching is inherent to the material properties rather than requiring continuous external control.
Solution Approach 2:
The memory structure achieves high data storage efficiency through controlled parameter changes in resistance and magnetization states, which can be switched using relatively low voltage pulses. The variable resistance material and MTJ structure enable state transitions with reduced energy barriers compared to conventional memory, improving data storage efficiency while controlling power consumption through optimized switching parameters.
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 solution enables electronic devices to operate with improved characteristics and high integration by utilizing the combination of variable resistance and MTJ structures, allowing for multiple resistance states and efficient data storage, enhancing performance and functionality.
Implementation Method 1
a variable resistance structure including a material having a resistance that is changed by formation or dissipation of conductive filaments
Implementation Method 2
The magnetization direction of the second magnetic layer is changed by spin transfer torque
Implementation Method 3
The MTJ structure has two different resistance states that correspond to a parallel magnetization direction configuration and an anti-parallel magnetization direction configuration of the first magnetic layer and the second magnetic layer
Implementation Method 4
a tunnel dielectric layer interposed between the first magnetic layer and the second magnetic layer
Data Source
AI summary
This technology provides an electronic device. An electronic device in accordance with an implementation of this document includes a semiconductor memory, and the semiconductor memory includes a variable resistance structure including a material having a resistance that is changed by formation or dissipation of conductive filaments; and a Magnetic Tunnel Junction (MTJ) structure inserted in the variable resistance structure and comprising a first magnetic layer having a pinned magnetization direction, a second magnetic layer having a variable magnetization direction, and a tunnel dielectric layer interposed between the first magnetic layer and the second magnetic layer.