Quantum Well Electromagnetic Shielding for High-Frequency Noise Absorption
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Solution Overview
Problem
Existing electromagnetic shielding technologies, such as metal shielding layers, are ineffective in absorbing high-frequency electromagnetic waves, leading to noise and crosstalk issues in high-frequency signal transmission due to reflection rather than absorption.
Innovation Solution
An electromagnetic shielding element incorporating a quantum well structure with multiple barrier and carrier confined layers, where the barrier layers are made of oxides or nitrides and the carrier confined layers are semiconductors or metals, effectively absorbing high-frequency electromagnetic waves by creating an energy barrier, thereby reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a metal shielding layer is used to block electromagnetic interference, then low frequency electromagnetic waves are absorbed, but high frequency electromagnetic waves are reflected and cause noise
Solution Approach 1:
The patent changes the material parameters from conventional metals to quantum well structures with specific barrier layer thicknesses (5nm-50nm) and well layer thicknesses (2nm-20nm), enabling the shielding material to absorb high frequency electromagnetic waves through quantum confinement effects rather than reflecting them
Solution Approach 2:
The patent employs composite quantum well structures consisting of alternating barrier layers and well layers with different material compositions and properties, creating a multi-layer composite that effectively absorbs electromagnetic waves across different frequency ranges while minimizing noise generation
2Productivity
If transmission lines are densely configured to meet high-frequency and high-speed requirements, then signal transmission capability is improved, but crosstalk between adjacent lines increases
Solution Approach 1:
The patent introduces quantum well structures as intermediary shielding elements positioned between densely packed transmission lines, which absorb electromagnetic waves and prevent coupling between adjacent lines, thereby reducing crosstalk while maintaining high transmission capability
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 quantum well structure effectively absorbs high-frequency electromagnetic noise, suppressing electromagnetic interference and crosstalk, and can be adapted to various frequency bands by adjusting the materials and thicknesses of the barrier and carrier confined layers.
Implementation Method 1
The quantum well structure includes two barrier layers and a carrier confined layer located between the two barrier layers. The thickness of each barrier layer is between 0.1 nm to 500 nm, and the thickness of the carrier confined layer is between 0.1 nm to 500 nm.
Implementation Method 2
the quantum well structure effectively absorbs high-frequency electromagnetic noise, suppressing electromagnetic interference and crosstalk
Data Source
AI summary
An electromagnetic shielding element and, transmission line assembly and electronic structure package using the same are provided. The electromagnetic shielding element is applied to the transmission line assembly and the electronic structure package to shield electromagnetic noise. The electromagnetic shielding element includes a quantum well structure, and the quantum well structure includes at least two barrier layers and at least one carrier confined layer located between the two barrier layers. Each barrier layer has a thickness between 0.1 nm and 500 nm, and the thickness of the carrier confined layer is between 0.1 nm and 500 nm. The electromagnetic shielding element absorbs electromagnetic wave noise to suppress electromagnetic interference.