Removable Pin Insert Test Socket for EMI Isolation
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Solution Overview
Problem
Current microcircuit test equipment faces challenges in making accurate, non-destructive electrical connections due to the small size and close spacing of microcircuit contacts, leading to misalignment and wear issues, which result in false defect identification and increased costs. Additionally, existing solutions do not efficiently address the need for rapid pin replacement and proper alignment, especially at high frequencies and in environments prone to electromagnetic interference (EMI).
Innovation Solution
A test fixture with a test socket contact block and base featuring removable pin inserts and a dielectric insert block that aligns pins precisely, allowing for user-selectable frequency response and minimizing EMI through a conductive base with anodized slots, enabling efficient and accurate testing while reducing wear and maintenance costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If test contacts are made with closely spaced microcircuit terminals, then electrical connection is achieved, but misalignment and wear occur leading to false defect identification
Solution Approach 1:
The test socket is divided into a base and a removable insert containing the pin array. This segmentation allows the pin array to be precisely manufactured and aligned independently, then transferred to the base, ensuring high alignment precision without affecting the entire test socket structure.
Solution Approach 2:
The pin array is implemented as a removable insert that can be replaced when worn or damaged. This allows the use of simpler, less expensive materials for the pin array while maintaining high reliability through replacement rather than requiring the entire test socket to be precision-manufactured as a single piece.
2Productivity
If automated testing is performed at high speed, then throughput increases, but wear on tester contacts increases causing debris and false defects
Solution Approach 1:
The pin array insert is designed to be removable and replaceable. When pins become worn or contaminated with debris during high-speed automated testing, the entire insert can be quickly removed and replaced with a fresh one, maintaining connection quality without stopping production for extensive maintenance.
Solution Approach 2:
The test system transitions from a static, permanently mounted pin array to a dynamic, replaceable insert. This allows the system to adapt to wear conditions by replacing inserts, enabling sustained high-speed operation while maintaining reliability.
3Manufacturing precision
If alignment template or board is used to align microcircuit with test contacts, then positioning is achieved, but complexity of test equipment increases
Solution Approach 1:
The alignment features are merged directly into the removable pin array insert rather than being separate components. The insert includes integrated alignment bosses that engage with alignment features on the base, combining positioning and electrical testing functions in a single component.
4Productivity
If test contacts are made with small spacing, then more terminals can be tested, but misalignment errors increase causing incorrect connections
Solution Approach 1:
By separating the pin array into a removable insert, each pin can be precisely positioned relative to its neighbors within the insert. This independent precision manufacturing of the segmented insert allows for closely spaced pins while maintaining accurate alignment, enabling high terminal density without sacrificing connection accuracy.
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
The solution provides reliable, low-contact-resistance connections, minimizes EMI and cross-talk, and allows for rapid pin replacement and alignment, enhancing testing throughput and reducing the risk of false defect identification, thereby improving the efficiency and accuracy of microcircuit testing.
Implementation Method 1
conductive base with anodized slots, enabling efficient and accurate testing while reducing wear and maintenance costs
Implementation Method 2
minimizes EMI and cross-talk
Data Source
AI summary
A test socket for a device under test (DUT) is disclosed in several embodiments. One embodiment shows a test socket base (16) with apertures (30) for insertion of test pin insert blocks (28). The blocks are inserted top—in or bottom—in and are provided with registration bosses 80 and teeth 92 or other means for maintaining registration. Blocks are provided with dielectric constants to achieve different frequency response relative to other pins. To achieve great EMI and cross talk isolation, the socket may be made of aluminum with hard anodize coating to insulate test pins (32) from the housing.