Laminated EMI Shielding Material With Fold-Line Penetrating Parts

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Solution Overview

Problem

Existing electromagnetic wave shielding materials face challenges in achieving high shielding ability against magnetic field waves and maintaining excellent bending performance, as they often struggle with increasing thickness and differences in elongatability between metal and magnetic layers, leading to wider curve widths during bending.

Innovation Solution

A laminate electromagnetic wave shielding material with metal layers as outermost layers and magnetic layers in between, incorporating a penetrating part such as a through-hole or groove that allows for bending with a narrower curve width by serving as a folding line, while maintaining high shielding ability by sandwiching the magnetic layers between metal layers.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the shielding material is made thicker to improve shielding ability against magnetic field waves, then the shielding performance is improved, but the bending performance deteriorates and the curve width increases

Engineering Contradiction:

Improveshielding abilityVSAvoidbending performance

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The shielding material is divided into multiple thin layers (metal layer, magnetic layer, metal layer) instead of using a single thick layer. This segmentation allows each layer to be thinner and more flexible, enabling better bending performance while maintaining overall shielding effectiveness through the combined structure.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The invention uses a composite structure combining metal layers and magnetic layers. The metal layers provide flexibility and bending capability, while the magnetic layers provide shielding against magnetic field waves. This composite material approach allows simultaneous achievement of both bending performance and shielding ability.

Inventive Principle:

Principle #40Composite materials

2Ease of operation

If the width of the curved portion is widened to improve bending ease, then the bending process becomes easier, but the curve width increases and processing into intended shape becomes difficult

Engineering Contradiction:

Improvebending easeVSAvoidcurve width

Core Design Contradiction:

Ease of operationVSShape

Solution Approach 1:

Dividing the shielding material into multiple thin layers reduces the overall thickness and increases flexibility, allowing the material to bend with a narrower curve width while still being easy to process into intended shapes.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

By changing the structural parameters from a single thick layer to multiple thin layers, the material achieves both ease of bending and narrow curve width, resolving the contradiction between bending ease and shape precision.

Inventive Principle:

Principle #35Parameter changes

3Reliability

If metal layers and magnetic layers are laminated to achieve high shielding ability, then the shielding performance is improved, but the difference in elongatability between layers causes processing difficulties

Engineering Contradiction:

Improveshielding abilityVSAvoidprocessing ease

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The laminate is divided into thin individual layers that can be processed separately before final assembly, reducing the impact of differential elongation during manufacturing while maintaining the protective laminate structure.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Each layer is designed with specific local properties optimized for its function (metal layers for flexibility and EMI shielding, magnetic layers for magnetic field shielding), allowing each layer to be processed according to its specific requirements rather than treating the entire laminate uniformly.

Inventive Principle:

Principle #3Local quality

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 solution enables both high electromagnetic wave shielding performance, particularly against magnetic field waves, and improved bending flexibility with a narrower curve width, balancing shielding effectiveness and processability.

Implementation Method 1

An electromagnetic wave shielding material is capable of exhibiting the performance of shielding electromagnetic waves (shielding ability) by reflecting electromagnetic waves incident on the shielding material by the shielding material

Methodology Applied

Scientific EffectReflection: Reflection

Implementation Method 2

Methodology Applied

Scientific EffectAbsorption: Absorption (EM radiation)

Data Source

PatentUS20240298433A1Electromagnetic wave shielding material, electronic component, electronic apparatus, and using method for electromagnetic wave shielding material

Publication Date: 2024.09.05 FUJIFILM CORP

AI summary

There are provided an electromagnetic wave shielding material, where the electromagnetic wave shielding material is a laminate in which both outermost layers are metal layers and one or more magnetic layers are provided, and the electromagnetic wave shielding material has a penetrating part that penetrates from a position on one side surface of the laminate to a position on the other side surface thereof, an electronic component and an electronic apparatus which include the electromagnetic wave shielding material, and a using method for the electromagnetic wave shielding material.