Automated Contactor Pin Characterization for Semiconductor Testing
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Solution Overview
Problem
Conventional contactor pins in automatic testing equipment for semiconductor devices wear out and become faulty due to contamination and other factors, leading to continuity issues and unnecessary replacement, with no effective method for automated diagnosis or verification, resulting in reduced productivity and increased costs.
Innovation Solution
A method and apparatus for characterizing contactor pins using a contactor test board within an automated test apparatus, where probes measure electrical characteristics such as resistance, inductance, or capacitance to determine the condition of each pin, allowing for targeted replacement or maintenance, and a universal test board accommodating different contactor styles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If contactor pins are replaced wholesale based on predetermined numbers of tested packages, then reliability is improved by preventing continuity problems, but productivity deteriorates due to unnecessary replacements and loss of useful life
Solution Approach 1:
The patent replaces manual mechanical replacement methods with an automated electrical testing system. The automated test apparatus uses electrical probes to measure contactor pin characteristics (resistance, continuity) and automatically identifies faulty pins, eliminating the need for manual replacement decisions and enabling precise targeted replacement only when necessary.
Solution Approach 2:
The system implements feedback by continuously monitoring contactor pin electrical characteristics and comparing them against predetermined thresholds. This feedback mechanism enables real-time identification of pins that have degraded beyond acceptable limits, allowing replacement decisions to be based on actual condition rather than arbitrary usage counters.
2Reliability
If contactor pins are replaced based on past experience estimates, then reliability is improved by preventing potential failures, but loss of time increases due to blind replacement without actual condition data
Solution Approach 1:
The patent applies preliminary action by testing and characterizing contactor pins before they actually fail. The automated testing system proactively identifies pins that are degrading toward failure thresholds, allowing replacement to be scheduled at the optimal moment - before failure occurs but without waiting for arbitrary time intervals or usage counts to expire.
3Loss of time
If manual testing of contactor pins is performed piecemeal, then loss of time is reduced compared to wholesale replacement, but productivity deteriorates due to time-consuming manual processes
Solution Approach 1:
The patent merges multiple functions into a single automated testing operation. The system simultaneously tests multiple contactor pins, performs electrical measurements (continuity, resistance), compares results against thresholds, and generates replacement decisions all in one automated process, eliminating the sequential manual operations of individual pin testing, analysis, and replacement scheduling.
4Productivity
If contactor pins are monitored and replaced only when actually faulty, then productivity is improved by reducing unnecessary replacements, but device complexity increases due to need for automated testing apparatus
Solution Approach 1:
The automated test apparatus is designed with universality to handle multiple contactor types and pin configurations through a single system. The test board can accommodate different contactor footprints and the system performs multiple measurement functions (continuity, resistance, threshold comparison) using the same hardware platform, reducing the complexity increase compared to dedicated specialized systems.
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 approach enables reliable and cost-effective monitoring and characterization of contactor pins, reducing unnecessary replacements, improving yield and reliability, and enhancing productivity by identifying faulty pins for specific repair or replacement, thus optimizing the use of contactor devices in semiconductor testing.
Implementation Method 1
measuring an electrical characteristic of the contactor pin, wherein the measured electrical characteristic may be used to determine a condition of the contactor pin
Implementation Method 2
measuring an electrical characteristic of the contactor pin, wherein the measured electrical characteristic may be used to determine a condition of the contactor pin
Data Source
AI summary
A method and apparatus is provided for characterizing a contactor for automated semiconductor device testing, the method first comprising placing the contactor on a contactor test board positioned within an automated test apparatus. A first probe of the automated test apparatus is contacted to a conductive layer of the contactor test board, and a second probe is placed on a contactor pin of the contactor, wherein the contactor pin is operable to linearly translate within the contactor. A predetermined pressure is applied to the contactor pin via the second probe, wherein the contactor pin is translated toward the contactor test board. An electrical characteristic of the contactor pin is measured between the first probe and the second probe and compared to a desired electrical characteristic, wherein a condition of the contactor pin is determined, based on the comparison of the measured electrical characteristic and the desired electrical characteristic.