Magnetic Shielding Layer with Tilted Magnetization for Uniform Attenuation
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Solution Overview
Problem
Existing semiconductor devices face challenges in effectively attenuating electromagnetic waves due to unstable magnetization states in magnetic shield layers, leading to non-uniform attenuation performance and spatial variations in multiple device configurations.
Innovation Solution
A semiconductor device design featuring a first member with multiple nonmagnetic and magnetic planar regions, where the magnetic planar regions have tilted magnetization directions, enhancing the attenuation characteristics by promoting multiple reflections and absorption of electromagnetic waves, thereby improving uniformity and efficiency of the shielding effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a magnetic shield layer is used to attenuate electromagnetic waves, then the shielding effectiveness is improved, but the magnetization state becomes unstable leading to non-uniform attenuation performance
Solution Approach 1:
The shield layer is segmented into alternating magnetic planar regions and nonmagnetic planar regions. This segmentation stabilizes the magnetization state by providing nonmagnetic regions that act as magnetic domain walls, preventing magnetization fluctuations while maintaining electromagnetic wave attenuation effectiveness.
Solution Approach 2:
The shield layer uses a composite structure combining magnetic materials (for attenuation) and nonmagnetic materials (for stabilization). This composite approach allows the magnetic regions to provide shielding while the nonmagnetic regions stabilize the overall magnetization state, resolving the contradiction between attenuation effectiveness and stability.
2Object-affected harmful factors
If a magnetic shield layer is used to improve attenuation characteristics, then the shielding effectiveness is enhanced, but spatial variations occur in multiple device configurations
Solution Approach 1:
The alternating pattern of magnetic and nonmagnetic planar regions creates a segmented structure that ensures uniform magnetic field distribution across different device configurations. This segmentation eliminates spatial variations by providing a consistent repeating pattern that maintains uniform attenuation performance.
Solution Approach 2:
Different regions have different properties: magnetic regions provide attenuation while nonmagnetic regions provide structural stability and uniformity. This local differentiation ensures that each region performs its specific function optimally, resulting in consistent overall performance across multiple device configurations.
3Stability of the object's composition
If magnetic planar regions are added to stabilize magnetization, then the attenuation characteristics are improved, but the device structure becomes more complex
Solution Approach 1:
The shield layer is divided into alternating magnetic and nonmagnetic segments, which stabilizes magnetization through the periodic structure. While this increases structural complexity compared to a single-layer design, the segmentation provides the necessary magnetization stability and uniformity across device configurations.
Solution Approach 2:
The composite structure of magnetic and nonmagnetic layers provides both stability and functionality. The complexity is justified by the dual benefits of stabilized magnetization and improved uniformity, which cannot be achieved with single-material layers.
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 proposed design achieves improved attenuation characteristics by stabilizing magnetization states and ensuring uniform performance across multiple semiconductor devices, resulting in enhanced electromagnetic wave shielding with reduced transmittance and increased reflectance at interfaces between magnetic and nonmagnetic layers.
Implementation Method 1
enhancing the attenuation characteristics by promoting multiple reflections and absorption of electromagnetic waves
Implementation Method 2
enhancing the attenuation characteristics by promoting multiple reflections and absorption of electromagnetic waves
Data Source
AI summary
According to one embodiment, a semiconductor device includes a semiconductor element, and a first member. The first member includes a first nonmagnetic planar region separated from the semiconductor element in a first direction, a first magnetic planar region provided between the first nonmagnetic planar region and the semiconductor element in the first direction, and a second nonmagnetic planar region provided between the first magnetic planar region and the semiconductor element in the first direction. The first magnetic planar region includes a first end portion extending along a second direction crossing the first direction. A first magnetization direction of the first magnetic planar region is tilted with respect to the second direction.