DUT Alignment Detection in Wafer Prober Sockets
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Solution Overview
Problem
Testing devices, such as wafer probers, face challenges in accurately aligning devices under test (DUTs), leading to impaired test results and yield loss due to faulty alignment.
Innovation Solution
A testing device equipped with a socket and dual detection modules, one on each side, to detect the location relationship and shifts of the DUT, ensuring precise alignment and correction of test results.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional testing devices are used without advanced detection modules, then the device complexity is low, but the measurement precision of DUT alignment is insufficient leading to faulty alignment
Solution Approach 1:
The detection system is divided into multiple independent detection modules (first detection module and second detection module) positioned at different locations. Each module independently detects alignment parameters, and the results are combined to provide comprehensive alignment information. This segmentation enables high measurement precision while keeping each individual module relatively simple.
Solution Approach 2:
A detection module is introduced as an intermediary component between the DUT and the control system. This intermediary detects the actual position of the DUT and provides feedback information that enables precise alignment correction, resolving the contradiction between simple device structure and high measurement precision.
2Manufacturing precision
If manual alignment methods are used, then the device complexity is low, but the manufacturing precision of DUT placement is poor leading to yield loss
Solution Approach 1:
The system enables self-alignment by automatically detecting the DUT position and providing feedback for correction. The DUT placement is verified and adjusted through the detection modules without requiring complex manual intervention, achieving high manufacturing precision while minimizing the complexity of the alignment system through automation.
Solution Approach 2:
The detection modules provide real-time feedback on DUT alignment status to the control system. This feedback mechanism enables automatic adjustment and correction of placement errors, significantly improving manufacturing precision while keeping the overall system complexity manageable through automated control loops.
3Reliability
If single detection module is used, then the device complexity is low, but the reliability of alignment detection is insufficient
Solution Approach 1:
Different detection modules are positioned at specific locations to detect different aspects of alignment. Each module is optimized for its specific detection task, and the combination of these specialized local detections provides comprehensive and reliable alignment verification, improving reliability without requiring all possible detection configurations.
Solution Approach 2:
Multiple detection modules are merged into a unified detection system that processes information from all modules. This merging approach combines the strengths of individual modules to achieve higher reliability in alignment detection while managing overall system complexity through integrated processing and coordination of the multiple modules.
Data Source
AI summary
A testing device is disclosed. The testing device includes a socket configured to support a DUT and a first detection module disposed at a first side of the socket and configured to detect a location relationship between the DUT and the socket.