Composite EM Absorption Structure for Thin Electronic Shielding
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Solution Overview
Problem
Existing electromagnetic interference from electronic devices causes operational disruptions and potential health risks, necessitating effective electromagnetic wave absorption structures that are lightweight and thin for modern electronic products.
Innovation Solution
A stacked configuration of conductive and insulating layers, including graphene, graphite, carbon fiber, or carbon nanotube layers, with varying thicknesses and materials, forming a conductive composite layer and insulating layer to create an electromagnetic wave absorption structure that is both lightweight and efficient.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional electromagnetic wave absorption materials are used, then electromagnetic wave absorption function is achieved, but the structure becomes heavy and thick
Solution Approach 1:
The patent employs composite materials combining conductive layers (graphene, graphite, carbon fiber, or carbon nanotube layers) with insulating layers (polymer resin, resin/ceramic mixture, or resin/metal mixture) to create a multi-layered electromagnetic wave absorption structure. This composite approach achieves effective electromagnetic wave absorption while maintaining a lightweight profile, resolving the contradiction between absorption performance and weight.
Solution Approach 2:
The patent utilizes thin film structures where the conductive layers have thicknesses between 5 nm and 200 nm and the insulating layers have thicknesses between 0.1 μm and 200 μm. These thin film configurations enable effective electromagnetic wave absorption without adding significant weight or thickness to the overall structure.
2Object-affected harmful factors
If traditional electromagnetic wave absorption materials are used, then electromagnetic wave absorption function is achieved, but the structure becomes thick
Solution Approach 1:
The multi-layered composite structure alternates between thin conductive layers (5-200 nm) and insulating layers (0.1-200 μm), achieving effective electromagnetic wave absorption within a total thickness of 5-5000 μm. This composite configuration provides superior absorption performance in a thin profile compared to traditional single-material approaches.
Solution Approach 2:
The patent transitions from single-layer to multi-layered stacking in the thickness dimension, creating alternating conductive and insulating layers. This dimensional approach to structure design enables enhanced electromagnetic wave absorption through multiple interfaces and layers while keeping the overall thickness minimal.
3Object-affected harmful factors
If conductive layers are added to improve electromagnetic wave absorption, then absorption performance increases, but sheet resistance decreases
Solution Approach 1:
The patent creates a composite structure where conductive layers (with sheet resistance between 10-1000 ohm per square) are alternated with insulating layers. This composite configuration allows the conductive layers to provide electromagnetic wave absorption while the insulating layers prevent excessive sheet resistance reduction, maintaining optimal electrical properties.
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 structure provides robust electromagnetic wave absorption, shielding electronic devices from interference and external electromagnetic waves, ensuring compliance with safety standards while maintaining a slim form factor.
Implementation Method 1
The electromagnetic wave absorption structure comprises at least one electromagnetic wave composite absorbing layer, and the electromagnetic wave composite absorbing layer comprises a conductive composite layer and an insulating layer, which are stacked and overlapped with the conductive composite layer
Implementation Method 2
The conductive layer is a graphene layer, a graphite layer, a graphite nanoplatelet layer, a carbon fiber layer, or a carbon nanotube layer
Data Source
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AI summary
An electromagnetic wave absorption structure includes at least one electromagnetic wave composite absorbing layer. The electromagnetic wave composite absorbing layer includes a conductive composite layer and an insulating layer. The insulating layer is stacked and overlapped with the conductive composite layer. The electromagnetic wave absorption structure can provide good electromagnetic wave absorption function, and have the features of light and thin, so it is particularly suitable for satisfying the electromagnetic wave absorption or shielding requirements of thin electronic products.