Shielding Pinboard Module Backplane Copper Integration
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Solution Overview
Problem
Existing shielding subrack modules for electronic products are costly and voluminous due to the use of metal plates and rear shielding cover plates, which increases the complexity and cost of electromagnetic compatibility (EMC) design, and restricts the installation of high-density circuit boards.
Innovation Solution
A shielding subrack module design that utilizes a printed circuit board backplane with both surfaces covered by copper sheets as a shielding body, omitting the rear cover plate, and connects the backplane to the subrack body with screws or rivets, allowing for flexible signal line connections and reduced component count.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metal plates and rear shielding cover plates are used for shielding, then electromagnetic shielding effect is improved, but shielding cost and device complexity increase
Solution Approach 1:
The patent combines the shielding function with the backplane by covering both surfaces of the backplane with copper sheets. This integration eliminates the need for separate rear shielding cover plates and reduces the number of metal plates required, thereby simplifying the shielding structure while maintaining electromagnetic shielding effectiveness.
Solution Approach 2:
The backplane serves dual functions: it provides structural support for mounting circuit boards and simultaneously acts as a shielding barrier through the copper sheets on both surfaces. This multi-functionality reduces the need for dedicated shielding components and lowers overall device complexity.
2Reliability
If metal plates and rear shielding cover plates are used for shielding, then electromagnetic shielding effect is improved, but shielding cost increases
Solution Approach 1:
The patent combines the shielding function with the backplane by covering both surfaces of the backplane with copper sheets. This integration eliminates the need for separate rear shielding cover plates and reduces the number of metal plates required, thereby simplifying the shielding structure while maintaining electromagnetic shielding effectiveness.
Solution Approach 2:
The patent uses copper sheets bonded to the backplane as a cost-effective shielding solution compared to traditional metal plates and rear cover plates. The copper sheets provide adequate shielding performance at lower material and manufacturing costs.
3Reliability
If rear shielding cover plate is installed, then electromagnetic sealing is improved, but effective depth dimension for circuit board installation is reduced
Solution Approach 1:
The patent removes the rear shielding cover plate from the shielding structure, relying instead on the copper sheets on both surfaces of the backplane to provide electromagnetic shielding. This extraction of the rear cover plate increases the effective depth dimension available for circuit board installation while maintaining shielding integrity through the integrated backplane design.
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 design reduces shielding costs, increases the effective size for high-density board installation, simplifies the structure, and enhances production efficiency while maintaining effective electromagnetic shielding.
Implementation Method 1
both surfaces of the backplane are covered by shielding copper sheet with no traces
Implementation Method 2
Each of the six sides of the subrack is formed of sheet material with shielding layer, typically metal plate
Data Source
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AI summary
A communication product, especially a shielding pinboard module is provided to resolve the problems of high cost and large volume existing in the shielding pinboard structure of prior arts. The shielding pinboard module of the invention includes a frame composed of a upper cover, a lower cover, a front board, a left side board and a right side board, and a back board which is fixed to the surround of the opening of the frame at edge. The backboard is a printed circuit board; two sides of the backboard are covered by blank shielding sheet copper. The upper cover, the lower cover, the front board, the left sideboard and the right sideboard include shielding layer. The upper cover, the lower cover, the front board, the left side board and the right side board, or the back board and the surround of the opening of the frame is fixed by bolts or rivets by each other. The pitch of the bolts or rivets is 20-60mm. Shielding material is installed in the gaps between the front board and the upper cover, the lower cover, the left sideboard, or the right sideboard.