Multilayer EM Shielding Material for Heat-Resistant Durability
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Solution Overview
Problem
Existing electromagnetic wave shielding materials face challenges in maintaining high shielding ability and durability under high temperatures and external forces, such as those encountered in electronic components and apparatuses.
Innovation Solution
An electromagnetic wave shielding material comprising a magnetic layer with magnetic particles and an acrylic resin between two metal layers, where the magnetic layer contains 5 ppm to 1,000 ppm of an organic solvent, and the acrylic resin has a weight-average molecular weight of 100,000 to 2,000,000, with a multilayer structure that includes metal layers with high Cu or Al content.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electromagnetic wave shielding material is exposed to high temperature, then the shielding ability may deteriorate, but maintaining high shielding ability after high temperature exposure requires specific material composition and structure
Solution Approach 1:
The patent employs a composite material structure consisting of a magnetic layer containing magnetic particles and acrylic resin, sandwiched between two metal layers. This composite structure combines the electromagnetic shielding properties of magnetic materials with the thermal stability of metal layers, creating a material that maintains shielding ability after high-temperature exposure. The specific composite formulation with controlled organic solvent content (5-1000 ppm) ensures both heat resistance and durable shielding performance.
2Reliability
If external force is applied to the electromagnetic wave shielding material, then the material may deform or damage, but improving durability to withstand external force requires enhanced structural integrity
Solution Approach 1:
The patent utilizes a composite material system where a magnetic layer (containing magnetic particles and acrylic resin) is sandwiched between two metal layers. This composite structure provides enhanced mechanical strength and durability against external forces such as falling or collision. The metal layers serve as protective outer layers that withstand mechanical stress, while the magnetic layer maintains its shielding function, creating a structure that is both durable and functional.
Solution Approach 2:
The shielding material is divided into distinct functional layers: outer metal layers that provide mechanical strength and protection against external forces, and an inner magnetic layer that provides electromagnetic shielding. This segmentation allows each layer to specialize in its primary function - the metal layers handle mechanical stress while the magnetic layer maintains shielding ability, resulting in improved overall durability.
3Ease of manufacture
If the organic solvent content in the magnetic layer is too high, then the material may be easier to process, but the heat resistance and durability deteriorate
Solution Approach 1:
The patent precisely controls the organic solvent content parameter in the magnetic layer, specifying it should be between 5 ppm and 1000 ppm. This parameter optimization balances processability with performance - enough solvent remains to allow proper material formation and processing, but the content is limited to prevent deterioration of heat resistance and durability. This controlled parameter approach ensures both manufacturability and reliable performance under extreme conditions.
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 material achieves excellent heat resistance and durability, ensuring high shielding ability against electromagnetic waves even under extreme conditions.
Implementation Method 1
An electromagnetic wave shielding material is capable of exhibiting the performance of shielding electromagnetic waves by reflecting electromagnetic waves incident on the electromagnetic wave shielding material by the electromagnetic wave shielding material and/or by attenuating the electromagnetic waves inside the electromagnetic wave shielding material
Implementation Method 2
The electromagnetic wave shielding material is capable of exhibiting the performance of shielding electromagnetic waves by reflecting electromagnetic waves incident on the electromagnetic wave shielding material
Data Source
Figure 1~2
AI summary
Provided are an electromagnetic wave shielding material including a magnetic layer containing magnetic particles and an acrylic resin between two metal layers, in which a content of an organic solvent in the magnetic layer is 5 ppm or more and less than 1,000 ppm on a mass basis, and an electronic component and an electronic apparatus which include the electromagnetic wave shielding material.