3D Fiber Shielding Sheet for Thin Devices and Side Leakage Control
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Solution Overview
Problem
Existing electromagnetic wave shielding materials face challenges in achieving flexibility, adhesion to curved or stepped surfaces, and preventing lateral electromagnetic wave leakage while maintaining vertical shielding performance, especially in thin electronic devices.
Innovation Solution
An electromagnetic wave shielding sheet with a three-dimensional network structure formed of metal-coated fibers, integrated conductive parts, and a conductive adhesive member, which includes a cover member to enhance adhesion and prevent lateral leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a metal plate or metal case is used as electromagnetic wave shielding material, then electromagnetic wave shielding performance is improved, but flexibility and stretchability deteriorate
Solution Approach 1:
The patent replaces rigid metal plates with a flexible fiber web substrate that has electromagnetic wave shielding properties. The fiber web can be bent and stretched while maintaining shielding performance, solving the contradiction between shielding effectiveness and flexibility.
Solution Approach 2:
The patent uses a composite structure combining fiber web substrate with conductive coatings or embedded conductive elements. This composite material achieves both flexibility from the fiber web and electromagnetic wave shielding from the conductive components.
2Adaptability or versatility
If a fiber web with conductivity is used to achieve flexibility, then flexibility is improved, but electromagnetic wave shielding performance deteriorates
Solution Approach 1:
The patent applies conductive properties to specific regions or layers of the fiber web rather than requiring the entire substrate to be conductive. This allows flexibility in the overall structure while maintaining shielding capability through localized conductive elements.
Solution Approach 2:
The patent combines non-conductive fiber web with conductive coatings, embedded conductive fibers, or conductive particle distributions. This composite approach provides flexibility from the fiber web while achieving electromagnetic wave shielding through the conductive components.
3Reliability
If multiple electromagnetic wave shielding materials are stacked to achieve sufficient shielding performance, then shielding performance is improved, but device complexity and thickness increase
Solution Approach 1:
The patent integrates multiple shielding functions into a single fiber web structure rather than stacking separate materials. The fiber web is designed with inherent conductive properties or embedded conductive elements that provide comprehensive shielding without requiring multiple discrete layers.
Solution Approach 2:
The patent uses localized conductive elements or coatings on the fiber web to achieve sufficient shielding performance. By strategically placing conductive properties where needed, the design achieves effective shielding with minimal material thickness and reduced structural complexity.
4Strength
If adhesive is used to laminate electromagnetic wave shielding materials, then adhesion between layers is improved, but lateral electromagnetic wave leakage increases
Solution Approach 1:
The patent removes the adhesive layer from the structure entirely. Instead of using adhesive to bond shielding materials, the design employs the fiber web's inherent flexibility and conformability to achieve adhesion to curved or stepped surfaces without introducing adhesive that could cause lateral leakage.
Solution Approach 2:
The flexible fiber web structure naturally conforms to surface geometries through its inherent flexibility, eliminating the need for adhesive bonding. This flexible film approach maintains electromagnetic wave blocking continuity while adapting to complex surface shapes.
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 shielding sheet provides excellent flexibility, adhesion to curved surfaces, and effective vertical shielding with minimal lateral leakage, suitable for thin electronic devices.
Implementation Method 1
electromagnetic waves emitted toward the electromagnetic wave shielding material are reflected by the electromagnetic wave shielding material
Implementation Method 2
electromagnetic waves emitted toward the electromagnetic wave shielding material are reflected by the electromagnetic wave shielding material or flow to the ground, thereby blocking the electromagnetic waves
Implementation Method 3
a conductive adhesive member in which a part of an entire thickness region is disposed on the second surface of the electromagnetic wave shielding part, and the remaining thickness region is disposed inside the second conductive part
Data Source
AI summary
An electromagnetic wave shielding sheet is provided. The provided has excellent flexibility and thus attaches well to curved or stepped surfaces, can be implemented in a thin structure and thus is suitable for use in electronic devices which continue to decrease in thickness, and has an excellent vertical shielding performance notwithstanding the decrease in thickness and thus can minimize or prevent electromagnetic waves from leaking through side surfaces.