Power Semiconductor Module PCB Alignment With Guiding Elements
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Solution Overview
Problem
Power semiconductor modules face mechanical damage and misalignment issues during the mounting of printed circuit boards due to excessive forces exerted when the boards are not accurately aligned with the contact elements, leading to instability and potential damage to the contact elements and the module.
Innovation Solution
The power semiconductor module arrangement incorporates guiding elements that are inserted into through holes of the printed circuit board to ensure accurate alignment and secure the board in place, preventing vertical and horizontal movements, thus reducing mechanical stress on the contact elements and providing a permanent mechanical connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If contact elements are arranged on the substrate and protrude through the housing cover, then electrical connection is enabled, but mechanical damage occurs during PCB mounting due to misalignment forces
Solution Approach 1:
The patent introduces guiding elements as intermediary components that mediate between the PCB and contact elements. These guiding elements are inserted into through-holes of the PCB and extend beyond the housing cover, providing a protective interface that absorbs misalignment forces during mounting, thereby preventing direct damage to the contact elements while maintaining electrical connection functionality
2Manufacturing precision
If printed circuit board is mounted directly to contact elements, then electrical connection is established, but alignment accuracy is poor leading to excessive forces on contact elements
Solution Approach 1:
The patent applies preliminary action by pre-installing guiding elements that protrude beyond the housing cover before PCB mounting. These guiding elements are positioned in advance to define the correct alignment position, so when the PCB is mounted, the through-holes align with the guiding elements first, establishing accurate positioning before the contact elements engage, thereby preventing excessive forces
3Ease of operation
If contact elements protrude through the housing cover, then PCB mounting is enabled, but vertical and horizontal movements of PCB are not prevented
Solution Approach 1:
The patent segments the mounting function into two distinct roles: guiding elements handle positioning and stability, while contact elements handle electrical connection. The guiding elements are specifically designed to prevent both vertical and horizontal PCB movements by engaging with the through-holes, separating the mechanical stabilization function from the electrical connection function, thereby ensuring PCB stability while maintaining ease of mounting
Data Source
Figure 1~2
Figure 3A~4
Figure 5~6C
AI summary
A power semiconductor module arrangement comprises a housing comprising sidewalls and a substrate arranged in the housing, the substrate comprising a dielectric insulation layer, a first metallization layer arranged on a first side of the dielectric insulation layer, and a second metallization layer arranged on a second side of the dielectric insulation layer, wherein the dielectric insulation layer is disposed between the first and the second metallization layer. The arrangement further comprises at least one semiconductor body mounted on a first surface of the first metallization layer which faces away from the dielectric insulation layer, a contact element that is mechanically and electrically connected to the substrate, wherein the contact element extends from the substrate through the interior of the housing to the outside of the housing in a direction perpendicular to the first surface, and at least two guiding elements coupled to the housing. If a printed circuit board comprising first and second through holes is mounted to the power semiconductor module arrangement, the guiding elements are configured to be inserted into the second through holes, thereby serving as an insertion aid that accurately aligns the printed circuit board and the contact element, and the guiding elements are further configured to securely hold the printed circuit board in a final mounting position on the power semiconductor module arrangement and prevent any vertical and horizontal movements of the printed circuit board when the printed circuit board is arranged in its final mounting position.