Conductive Shield Projections Deform Gasket for Thin Device EMI Shielding

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Solution Overview

Problem

Conventional electromagnetic shielding solutions for electronic devices, such as cellular phones, require multiple air gaps which increase the device height, making them less suitable for thin mobile devices and are prone to assembly failures due to high compression requirements.

Innovation Solution

A conductive gasket and shield assembly with penetrating projections that deform the gasket to couple the shield and gasket together, reducing the overall device height to a single air gap and minimizing compression needs, while allowing for assembly tolerance and imperfection correction.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If multiple air gaps are used in conventional shielding solutions, then electromagnetic shielding is achieved, but device height increases

Engineering Contradiction:

Improveelectromagnetic shieldingVSAvoiddevice height

Core Design Contradiction:

Object-affected harmful factorsVSLength of moving object

Solution Approach 1:

The patent merges the functions of multiple air gaps into a single integrated shielding structure. The conductive shield with integrated gasket eliminates the need for separate air gaps between components and shielding elements, reducing overall device height while maintaining electromagnetic shielding effectiveness.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The conductive gasket is nested within the conductive shield structure, with the gasket forming part of the shield assembly rather than being a separate component. This nesting approach allows the shielding elements to be compactly integrated, reducing the vertical space required.

Inventive Principle:

Principle #7Nested doll (Nesting)

2Ease of manufacture

If high compression is applied to couple shielding components, then assembly is achieved, but assembly failure rate increases

Engineering Contradiction:

ImproveassemblyVSAvoidassembly failure rate

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The patent changes the material parameters of the gasket, specifically selecting a material with appropriate hardness relative to the shield. The gasket material hardness is carefully controlled to allow easy deformation during assembly without requiring excessive compression force, thereby reducing assembly failure rates.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The conductive gasket is designed as a flexible component that can be easily deformed during assembly. This flexibility allows the gasket to conform to the shield structure with minimal compression, reducing the risk of assembly failures while ensuring proper electrical and mechanical coupling.

Inventive Principle:

Principle #30Flexible shells and thin films

3Reliability

If projections penetrate conductive gasket, then electrical and mechanical coupling is achieved, but gasket material hardness must be softer

Engineering Contradiction:

ImprovecouplingVSAvoidgasket material hardness

Core Design Contradiction:

ReliabilityVSStrength

Solution Approach 1:

The patent specifies a hardness parameter range for the gasket material that is softer than the shield material. This parameter change enables the projections to penetrate and deform the gasket effectively, achieving reliable electrical and mechanical coupling while controlling the deformation to prevent gasket failure.

Inventive Principle:

Principle #35Parameter changes

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 reduces the overall device height, minimizes assembly failure rates, and provides a tolerant assembly process by using a conductive gasket and shield with differing hardnesses and projections to ensure secure and efficient electromagnetic shielding.

Implementation Method 1

A conductive shield has a plurality of projections extending therefrom sufficient to deform the gasket body to couple the conductive shield and the conductive gasket together

Methodology Applied

Scientific EffectDeformation: Deformation

Implementation Method 2

The projections can be pointed teeth designed for penetrating the conductive gasket so as to electrically and mechanically couple the conductive shield to the conductive gasket

Methodology Applied

Scientific EffectMechanical Force: Mechanical Force

Implementation Method 3

Electromagnetic shielding reduces electromagnetic fields emanating from electronic devices (e.g., cellular phones or other mobile devices) by using barriers made of conductive material

Methodology Applied

Scientific EffectElectromagnetic shielding: Faraday Cage

Data Source

PatentUS10299416B2Shield for electronic components

Publication Date: 2019.05.21 MICROSOFT TECHNOLOGY LICENSING LLC

AI summary

Technologies are described for shielding electronic components. In one embodiment, a conductive gasket includes a gasket body. A conductive shield has a plurality of projections extending therefrom sufficient to deform the gasket body to couple the conductive shield and the conductive gasket together. The projections can be pointed teeth designed for penetrating the conductive gasket so as to electrically and mechanically couple the conductive shield to the conductive gasket. The conductive gasket can be stacked onto the conductive shield to form a sidewall, which can be mounted on a PCB. A conductive cover can then be placed on the conductive gasket to create a cavity in which electronic components can be positioned.