Electromagnetic Shield Projections for Circuit Board Leakage

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing electromagnetic shielding methods for circuit boards are either costly and inflexible or complicated and space-intensive, failing to provide effective low-level leakage protection and adaptable shielding arrangements.

Innovation Solution

The use of multiple electromagnetic shields with projections that make electrical contact with each other to enhance shielding effectiveness, reduce the number of shielding devices needed, and allow for flexible and cost-effective assembly and manufacturing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If multiple electromagnetic shields are placed on the circuit board to provide comprehensive shielding coverage, then shielding effectiveness is improved, but device complexity and space occupation increase

Engineering Contradiction:

Improveshielding effectivenessVSAvoidshielding arrangement complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The circuit board is divided into multiple shielded areas, each covered by a separate electromagnetic shield. Each shield is an independent component that can be individually positioned and connected, allowing comprehensive shielding coverage while maintaining manageable complexity through modular design

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Multiple electromagnetic shields are arranged in overlapping or nested configurations where shields for different areas may partially overlap or nest within each other. This nesting approach allows multiple shields to share space efficiently, reducing overall space occupation while maintaining shielding effectiveness across all areas

Inventive Principle:

Principle #7Nested doll (Nesting)

2Reliability

If electromagnetic shields are soldered directly to ground pads on the circuit board to create electrical connection, then electrical connectivity is improved, but ease of repair and component accessibility worsen

Engineering Contradiction:

Improveelectrical connectivityVSAvoidcomponent accessibility

Core Design Contradiction:

ReliabilityVSEase of repair

Solution Approach 1:

The electrical connection between electromagnetic shields and the circuit board is made reversible rather than permanent. Shields can be temporarily attached during assembly and easily removed or detached during repair operations, providing the flexibility needed for maintenance while maintaining reliable electrical connectivity during operation

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

Instead of direct soldering between shields and ground pads, an intermediary connection method is used that allows electrical connectivity to be maintained during normal operation but enables easy disconnection for repair. This intermediary approach decouples the permanent bonding requirement from the electrical connection requirement

Inventive Principle:

Principle #24Intermediary (Mediator)

3Reliability

If conductive housings are used to form the shielding compartment, then shielding effectiveness is improved, but manufacturing cost increases

Engineering Contradiction:

Improveshielding effectivenessVSAvoidmanufacturing cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

Instead of using expensive conductive housings or metalized plastic components for shielding, the invention employs inexpensive electromagnetic shield components that can be easily manufactured and replaced. These simple shield elements provide effective shielding at low cost, treating the shielding function as a replaceable component rather than an integral expensive housing feature

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

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

This approach provides improved electromagnetic shielding with reduced leakage, simplified assembly, and cost-effectiveness, while allowing for complex shielding arrangements and easy access for maintenance and repair.

Implementation Method 1

at least one of the electromagnetic shields has at least one projection therefrom that contacts and makes electrical connection with a surface of the other electromagnetic shield

Methodology Applied

Scientific EffectElectrical conduction: Conduction (electrical)

Data Source

PatentUS8462519B2Method of shielding a circuit board, circuit board, electromagnetic shield and method of manufacturing same

Publication Date: 2013.06.11 ETL SYST

AI summary

There is disclosed a method of shielding a circuit board, a circuit board, an electromagnetic shield and a method of manufacturing an electromagnetic shield. In an aspect, the method comprises placing a first electromagnetic shield over a first area of the circuit board and placing a second electromagnetic shield over a second area of the circuit board. At least one of the electromagnetic shields has at least one projection therefrom that contacts and makes electrical connection with a surface of the other electromagnetic shield when the shields are placed on the circuit board.