Semiconductor Module Terminal Step Structure for PCB Support
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Solution Overview
Problem
Existing semiconductor modules face challenges in efficiently supporting printed circuit boards due to height differences and alignment issues between terminals and circuit board holes.
Innovation Solution
The semiconductor module incorporates a printed circuit board with through holes and an internal terminal unit featuring internal terminals and extended internal terminals with step formations, allowing the printed circuit board to be stably supported by the level difference portions of the extended internal terminals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional terminals with uniform width are used to pass through circuit board holes, then the structure is simple, but the printed circuit board cannot be stably supported and alignment deviations cause support failures
Solution Approach 1:
The terminal structure employs different width portions at different locations: a first width for passing through the hole and a second width (greater than the first) for supporting the printed circuit board. This local variation in dimensional properties enables the terminal to simultaneously achieve stable support function and maintain structural simplicity, resolving the contradiction between support reliability and device complexity.
2Manufacturing precision
If the printed circuit board is tightly fixed to prevent movement, then positioning accuracy is improved, but the module size increases and flexibility is reduced
Solution Approach 1:
The terminal structure utilizes a step formation with two different width portions to create a mechanical stop that accommodates alignment deviations. This parameter change in terminal geometry allows the printed circuit board to be positioned accurately without requiring excessive tight fixation, thereby maintaining compact module size while achieving sufficient positioning precision.
3Reliability
If multiple separate components are used to support the printed circuit board, then support stability is improved, but the device complexity and assembly steps increase
Solution Approach 1:
The support function is integrated into the terminal structure itself through the step formation with two width portions. The extended terminal with enlarged width portion serves both as an electrical connection element and as a mechanical support element for the printed circuit board. This merging of functions eliminates the need for separate support components, reducing assembly complexity while maintaining support stability.
Data Source
AI summary
A semiconductor module includes a printed circuit board and an internal terminal unit. The internal terminal unit includes an internal terminal group including a plurality of internal terminals that are aligned in a predetermined direction and each have a first width in the predetermined direction, and an extended internal terminal that has a step portion formed by a first portion having the first width and a second portion having a second width greater than the first width in the predetermined direction and that supports the printed circuit board by the second portion. The extended internal terminal is located at a first end of the internal terminal unit that is opposite to a second end of the internal terminal unit in the predetermined direction. The second portion extends from the first portion in the predetermined direction from the second end toward the first end of internal unit.