Saw-Tooth Inspection Jig for Bent Lead Pin Alignment
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Solution Overview
Problem
Existing inspection jigs for semiconductor devices with lead pins are ineffective in correcting significant bending, necessitating additional steps and prolonging the inspection process.
Innovation Solution
An inspection jig with saw teeth structures and a pressing mechanism that aligns and applies pressure to lead pins, allowing for simultaneous correction and electrical connection, thereby shortening the inspection time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the inspection jig uses recesses in the contact pusher to guide lead pins, then lead pin bending can be corrected to some extent, but the correction effect is limited and greatly bent lead pins cannot be guided to the recesses
Solution Approach 1:
The patent introduces a movable pressing portion that can dynamically adjust its position and apply variable pressure to the lead pins. This dynamic mechanism allows the jig to adapt to different bending degrees by adjusting the pressing force and position, enabling correction of greatly bent lead pins that static recesses cannot accommodate.
Solution Approach 2:
The patent changes the physical parameters of the pressing portion, including its material properties, geometric dimensions, and elastic modulus, to optimize its pressing characteristics. These parameter changes enable the pressing portion to effectively correct lead pin bending while maintaining adaptability to various bending conditions.
2Manufacturing precision
If additional jigs are used to correct greatly bent lead pins before inspection, then lead pin bending can be corrected, but the inspection process time increases
Solution Approach 1:
The patent merges the lead pin correction function and the electrical connection function into a single integrated inspection jig. The pressing portion that corrects lead pin bending is combined with the contact pusher that establishes electrical connection, allowing both correction and inspection to occur simultaneously in one process step, thereby eliminating the need for separate correction jigs and reducing inspection time.
Solution Approach 2:
The inspection jig performs the correction action preliminarily during the inspection process itself, rather than requiring separate pre-correction steps. The pressing portion automatically corrects lead pin bending as part of the inspection procedure, enabling immediate electrical connection and inspection without additional preparation time.
3Manufacturing precision
If the pressing portion applies pressure to the lead pins to correct bending, then lead pin alignment improves, but the structure becomes more complex
Solution Approach 1:
The pressing portion is designed with multi-functionality, serving both as a pressing mechanism for correcting lead pin bending and as a structural component of the inspection jig. This universal design reduces the need for separate dedicated components, thereby limiting the increase in structural complexity while achieving effective lead pin alignment.
Data Source
AI summary
An inspection jig for a semiconductor device provided with a plurality of lead pins includes: a contact portion in which contact electrodes are formed at troughs of first saw teeth; and a pressing portion in which second saw teeth are formed. During inspection of the semiconductor device, the contact portion is disposed such that the troughs of the first saw teeth correspond to the plurality of lead pins, the pressing portion is disposed such that the second saw teeth apply, to the plurality of lead pins, pressure toward the troughs of the first saw teeth, and the pressing portion applies pressure to the contact portion in a direction in which the plurality of lead pins extend, so that the pressing portion and the contact portion integrally move in the direction in which the plurality of lead pins extend.