Nano-Web Shielding Sheet Resolving Thickness and Adhesion Contradictions

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Solution Overview

Problem

Conventional electromagnetic wave shielding sheets are thick due to synthetic resin films, leading to increased device thickness and potential peeling of conductive metal layers, which degrades shielding performance.

Innovation Solution

A nano-web formed substrate using a spinning method with a conductive metal layer on one surface and an adhesive or non-porous film layer on the other, preventing peeling and enhancing shielding performance, integrated with a built-in antenna for improved thinness and efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If a synthetic resin film is used as the substrate sheet, then the electromagnetic wave shielding sheet can be manufactured, but the thickness of the shielding sheet increases

Engineering Contradiction:

ImprovemanufacturabilityVSAvoidthickness

Core Design Contradiction:

Ease of manufactureVSLength of stationary object

Solution Approach 1:

The patent replaces the conventional synthetic resin film substrate with an ultrathin polymer film substrate having a thickness of 1 μm to 10 μm. This thin film substrate maintains the necessary mechanical properties while dramatically reducing the overall thickness of the electromagnetic wave shielding sheet, directly resolving the contradiction between manufacturability and thickness reduction.

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The patent creates a composite structure by forming a conductive metal layer on the ultrathin polymer film substrate. This composite material approach allows the combination of the flexibility and ease of manufacture of polymer films with the electromagnetic shielding capabilities of conductive metals, while the ultrathin nature of the polymer substrate minimizes overall thickness.

Inventive Principle:

Principle #40Composite materials

2Reliability

If a conductive metal layer is deposited on the synthetic resin film surface, then electromagnetic wave shielding is achieved, but the conductive metal layer peels off

Engineering Contradiction:

Improveshielding performanceVSAvoidadhesion

Core Design Contradiction:

ReliabilityVSStability of the object's composition

Solution Approach 1:

The ultrathin polymer film substrate provides enhanced surface contact and adhesion for the conductive metal layer compared to thicker synthetic resin films. The thin film structure allows for better integration and bonding between the substrate and the conductive metal layer, preventing peeling while maintaining shielding performance.

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The patent creates a well-bonded composite structure where the conductive metal layer is formed directly on the ultrathin polymer film substrate. This composite approach ensures strong adhesion between the layers, preventing the conductive metal from peeling off while maintaining the necessary electromagnetic shielding reliability.

Inventive Principle:

Principle #40Composite materials

3Length of stationary object

If the substrate thickness is reduced, then the overall device thickness decreases, but the mechanical strength may be compromised

Engineering Contradiction:

ImprovethicknessVSAvoidmechanical strength

Core Design Contradiction:

Length of stationary objectVSStrength

Solution Approach 1:

The patent utilizes advanced ultrathin polymer film technology that maintains adequate mechanical strength despite the reduced thickness of 1 μm to 10 μm. These specialized thin films are engineered to provide sufficient structural integrity and flexibility while enabling the overall thickness reduction of the electromagnetic wave shielding sheet.

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The composite structure of the ultrathin polymer film substrate combined with the conductive metal layer provides enhanced mechanical strength compared to the thin polymer film alone. The conductive metal layer acts as a reinforcing layer that compensates for the reduced thickness, maintaining mechanical strength while enabling overall thickness reduction.

Inventive Principle:

Principle #40Composite materials

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 results in a thinner electromagnetic wave shielding sheet with improved adhesion and shielding performance, preventing metal layer peeling and enhancing the integration of the metal material, thereby effectively blocking electromagnetic waves.

Implementation Method 1

a substrate in a nano-web structure formed by spinning a polymer material

Methodology Applied

Scientific EffectSpinning method:

Implementation Method 2

a conductive metal layer formed on one surface of the substrate in the nano-web structure for shielding electromagnetic waves

Methodology Applied

Scientific EffectElectromagnetic wave shielding: Faraday Cage

Data Source

PatentUS9966660B2Electromagnetic wave shielding sheet, manufacturing method thereof, and built-in antenna having the same

Publication Date: 2018.05.08 AMOGREENTECH CO LTD

AI summary

Provided is an electromagnetic wave shielding sheet including: a substrate that is formed in a nano-web form by spinning a polymer material into fiber strands by a spinning method; a conductive metal layer that is formed on one surface of the substrate for shielding electromagnetic waves; and an adhesive layer formed on the other surface of the substrate, to thereby make a thickness of the electromagnetic wave shielding sheet thin, and improve electromagnetic wave shielding performance.