PCB Shielding Structure Merging Frames to Reduce Cost
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Solution Overview
Problem
Existing shielding structures for printed circuit boards (PCBs) in electronic devices are costly and prone to reduced performance due to inadvertent openings formed during the bending of shielding frames, which can compromise the effectiveness of electromagnetic wave shielding.
Innovation Solution
A shielding structure that uses two shielding members with closed shapes contacting each other at specific locations to create three shielding spaces, covered by a single shielding cover, reducing material costs and avoiding openings that can diminish shielding performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple shielding frames are used to cover each shielding space separately, then shielding coverage is improved, but material costs increase
Solution Approach 1:
The patent merges multiple separate shielding frames into a single integrated shielding frame that covers multiple shielding spaces simultaneously. This single shielding frame includes multiple shielding walls that extend into the PCB interior, creating multiple shielding spaces without requiring multiple separate frames, thus reducing material cost while maintaining comprehensive shielding coverage.
Solution Approach 2:
The single shielding frame serves multiple functions by covering multiple different shielding spaces with different orientations (first direction and second direction perpendicular to each other). This multi-functional design allows one shielding frame to replace what would traditionally require multiple separate shielding frames, reducing overall material usage.
2Ease of manufacture
If shielding frames are bent to form shielding walls, then shielding spaces are created, but openings are inadvertently formed reducing shielding performance
Solution Approach 1:
The shielding walls are formed by extending metal sheets during the PCB manufacturing process itself, rather than by bending pre-formed shielding frames after manufacturing. This preliminary action during manufacturing prevents the formation of openings that would occur with bending operations, ensuring continuous shielding performance while still creating the necessary shielding spaces.
Solution Approach 2:
The patent replaces the mechanical bending process with a metal sheet extension process during PCB manufacturing. Instead of mechanically bending shielding frames to form walls (which creates openings), the shielding walls are formed by extending metal sheets in a controlled manufacturing process that maintains continuous material coverage and prevents openings.
3Object-generated harmful factors
If shield cans are used to block EM waves, then EM interference is reduced, but device complexity increases
Solution Approach 1:
The patent combines multiple shielding functions into a single integrated shielding frame structure that provides shielding in multiple directions and spaces simultaneously. This merged structure reduces device complexity compared to using multiple separate shield cans, while still effectively blocking EM interference across multiple shielding spaces.
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 configuration reduces material costs and enhances electromagnetic wave shielding performance by eliminating openings and ensuring continuous shielding coverage.
Implementation Method 1
A shielding structure that blocks EM waves may be added to reduce mutual EM interference between the plurality of components, and protect a user of the electronic device from EM emissions
Data Source
AI summary
Disclosed herein is an electronic device and printed circuit board (PCB). The electronic device includes: a housing, the PCB disposed in the housing, a first shielding part including a first shielding member having a closed shape, disposed on a first surface of the PCB, a second shielding part including a second shielding member having a closed shape, a shielding cover covering the first shielding part and the second shielding part, wherein the first shielding member and the second shielding member contact each other at a first location and a second location on the first surface, wherein a third shielding part is defined between the first shielding member and the second shielding member, and wherein the shielding cover is disposed to correspond to the first shielding part, the second shielding part, and the third shielding part.