EMI Shielding Corner Segmentation for PCB Rigidity
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Solution Overview
Problem
Existing shielding apparatus for electronic systems, particularly those with folded side walls, are susceptible to deformation and lack the necessary structural integrity required for proper installation and use on printed circuit boards (PCBs), which can lead to inefficiencies and signal interference due to electromagnetic interference (EMI).
Innovation Solution
The development of shielding apparatus with partially drawn and partially formed corner sections that integrate with side walls to enhance rigidity, featuring interlocking engagement mechanisms between side edges to maintain flatness and improve structural strength, thereby reducing deformation and ensuring proper contact with solder paste on PCBs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If shielding apparatus with folded side walls is used, then ease of manufacture is improved, but structural integrity and rigidity deteriorate
Solution Approach 1:
The corner sections are segmented into three distinct portions: a first portion integrally connected to adjacent side walls, a second portion extending downward from the first portion, and a third portion integrally connected to the second portion and extending toward the interior. This segmentation allows each portion to contribute specifically to structural reinforcement while maintaining manufacturability through standard forming processes.
Solution Approach 2:
The corner sections extend in multiple dimensions - the first portion connects horizontally to side walls, the second portion extends vertically downward, and the third portion projects into the interior space. This multi-dimensional configuration provides structural reinforcement in multiple directions, significantly improving rigidity compared to simple folded corners.
2Ease of manufacture
If shielding apparatus with folded side walls is used, then ease of manufacture is improved, but resistance to deformation deteriorates
Solution Approach 1:
The corner sections are segmented into three distinct portions: a first portion integrally connected to adjacent side walls, a second portion extending downward from the first portion, and a third portion integrally connected to the second portion and extending toward the interior. This segmentation allows each portion to contribute specifically to structural reinforcement while maintaining manufacturability through standard forming processes.
Solution Approach 2:
The corner sections function as composite structural elements combining multiple geometric portions (first, second, and third portions) into a single integrated feature. This composite structure provides enhanced deformation resistance compared to simple folded corners, while still being formed from the same sheet material through standard forming processes.
3Reliability
If shielding apparatus with enhanced rigidity is implemented, then resistance to deformation is improved, but device complexity increases
Solution Approach 1:
The corner sections merge multiple functions into a single structural feature: they provide structural reinforcement, define the interior space, and serve as integral connection points between side walls. This merging approach enhances rigidity without proportionally increasing complexity, as the corner sections are formed as part of the standard manufacturing process rather than requiring additional components or assembly steps.
Data Source
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AI summary
According to various aspects of the present disclosure, exemplary embodiments are provided of shielding apparatus that are suitable for use in providing electromagnetic interference shielding for one or more electrical components on a substrate. The shielding apparatus have partially drawn and partially formed corner sections (10) for improved rigidity. In one exemplary embodiment, a shielding apparatus generally includes side walls (108) configured to be disposed generally about one or more electrical components on a substrate. Corner sections (110) are integrally formed with the side walls. Each corner section has a drawn portion (136) integrally connecting a corresponding pair of side walls (108), and a lower portion (138) located generally below the drawn portion and generally between side edge portions of the corresponding pair of side walls.