Shield Can Assembly Segmentation for Compact EMI Protection
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Solution Overview
Problem
As electronic devices become smaller and more compact, there is an increasing need to mitigate electromagnetic interference affecting internal components, which traditional shield cans fail to adequately address.
Innovation Solution
A shield can assembly comprising a combination of first and second shield members forming a partition wall around the shield area on the PCB, with a shield cover enclosing the assembly, effectively blocking electromagnetic interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a traditional shield can is used to cover electrical components, then electromagnetic interference protection is provided, but the device size and weight increase
Solution Approach 1:
The shield can assembly is divided into multiple segments: first shield members extending in a first direction, second shield members extending in a second direction perpendicular to the first direction, and a shield cover. This segmentation allows the shielding function to be distributed across multiple smaller components rather than requiring a single large shield can, thereby reducing overall device weight while maintaining EMI protection effectiveness.
Solution Approach 2:
The shield members and shield cover are configured to enclose the shield area in a nested manner, with the shield cover covering the top surface and the shield members forming vertical walls. This nested structure provides comprehensive EMI shielding without requiring excessive material, optimizing the balance between protection and weight.
2Object-affected harmful factors
If a traditional shield can is used to cover electrical components, then electromagnetic interference protection is provided, but the device volume increases
Solution Approach 1:
The shield can assembly is divided into multiple segments: first shield members extending in a first direction, second shield members extending in a second direction perpendicular to the first direction, and a shield cover. This segmentation allows the shielding function to be distributed across multiple smaller components rather than requiring a single large shield can, thereby reducing overall device volume while maintaining EMI protection effectiveness.
Solution Approach 2:
The shield members extend in multiple directions (first direction and second direction perpendicular to the first direction) to form a three-dimensional enclosure around the shield area. This multi-dimensional approach provides comprehensive EMI shielding without requiring excessive vertical height or horizontal footprint, optimizing the volume efficiency of the shielding structure.
3Object-affected harmful factors
If shield members extend in multiple directions to form a closed-loop structure, then EMI protection effectiveness is improved, but manufacturing complexity increases
Solution Approach 1:
The complex closed-loop shield structure is segmented into standardized first shield members and second shield members that can be manufactured independently using standard PCB fabrication processes. Each shield member type can be produced using conventional techniques, and the overall complex shape is achieved through the arrangement of these simpler, standardized components rather than requiring complex monolithic manufacturing.
Solution Approach 2:
Multiple shield members are combined to form the complete closed-loop shield can assembly. The first shield members and second shield members are positioned and connected to create the final enclosed structure, allowing the complex EMI shielding geometry to be assembled from simpler individual components rather than manufactured as a single complex piece.
Data Source
AI summary
An electronic device includes: a housing; a printed circuit board (PCB) in the housing and including a board surface that include a shield area and a shield can assembly disposed along a circumference of the shield area and connected to the PCB, the shield can assembly forming a partition wall perpendicular to the board surface. The shield can assembly includes at least one first shield member extending in a first direction, a plurality of second shield members including a first portion extending in a second direction perpendicular to the first direction and a second portion extending in the first direction; and a shield cover connected to the at least one first shield member and the plurality of second shield members and covering the shield area. The at least one first shield member and the plurality of second shield members enclose at least a portion of the shield area.