Modular Electronic Testing System With Removable DUT PCB
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Solution Overview
Problem
Conventional semiconductor testing systems are inflexible, large, and costly, requiring dedicated machines for each type of semiconductor chip, which is inefficient in terms of space and equipment utilization, and they do not easily convert between testing different electrical interconnects and devices under test (DUTs).
Innovation Solution
A compact testing system with a modular design that includes a housing, a receiver assembly, and a test control system with a motherboard and capsules, allowing for quick and easy conversion between configurations for testing various electrical interconnects and DUTs, using a DUT PCB that can be easily inserted and removed, and a fastener assembly for secure clamping, facilitating the testing of multiple chip types in a limited cleanroom space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional semiconductor testing systems are used, then dedicated testing machines can be provided for each chip type, but the system size becomes very large and requires extensive cleanroom space
Solution Approach 1:
The testing system employs a universal test PCB platform that can accommodate multiple socket types (PGA, BGA, QFP, TSOP) through a single standardized interface. The test PCB includes a socket assembly that can be reconfigured to test different semiconductor chip types, eliminating the need for separate dedicated testing machines for each chip type while maintaining accurate testing capabilities
Solution Approach 2:
The system combines multiple testing functions into a single integrated testing machine. The test PCB integrates the socket assembly, electrical contacts, and signal routing pathways into one unified structure that can handle various chip types, thereby consolidating what would traditionally require multiple separate testing systems into a single compact unit
2Reliability
If conventional semiconductor testing systems are used, then dedicated electrical interconnects and DUT PCBs can be provided for each chip type, but the system becomes inflexible and difficult to convert between configurations
Solution Approach 1:
The testing system implements dynamic reconfigurability through a standardized test PCB interface that allows the socket assembly to be quickly swapped between different configurations. The electrical contacts are arranged in a flexible matrix pattern that can accommodate various socket types without requiring manual hand wiring, enabling rapid adaptation to different chip types while maintaining reliable electrical connections
Solution Approach 2:
The system segments the testing functionality into modular components: a standardized test PCB platform, interchangeable socket assemblies, and a common control system. This segmentation allows the socket assembly to be independently replaced or reconfigured for different chip types without affecting the overall system architecture or requiring complete system redesign
3Reliability
If conventional semiconductor testing systems are used, then dedicated testing equipment can be provided for each chip type, but capital costs and equipment costs become very high
Solution Approach 1:
The testing system uses a universal test PCB platform with standardized electrical contacts and signal routing that can test multiple socket types (PGA, BGA, QFP, TSOP) with a single device. This eliminates the need to purchase separate dedicated testing equipment for each chip type, significantly reducing capital expenditure while maintaining accurate testing capabilities across all socket types
Solution Approach 2:
The system uses a standardized electrical contact matrix on the test PCB that replicates the necessary signal pathways for different socket types through programmable configuration rather than requiring custom-hardware copies for each chip type. This allows the same physical hardware to be reconfigured for different testing scenarios, reducing the need for multiple expensive dedicated systems
4Reliability
If conventional semiconductor testing systems are used, then manual hand wiring of DUT PCB with testing electronics can be done, but the process becomes time-consuming and complex
Solution Approach 1:
The system replaces manual hand wiring with an automated electrical contact matrix system. The test PCB includes pre-configured electrical contacts arranged in standardized patterns that automatically establish electrical connections when the socket assembly is placed in the correct position. This eliminates the need for manual wire bonding or hand wiring operations while maintaining reliable electrical connectivity for testing
Solution Approach 2:
The socket assembly and test PCB are designed with self-aligning features including positioning protrusions and corresponding recesses that automatically ensure correct alignment of electrical contacts when components are assembled. This self-alignment mechanism eliminates the need for complex manual wiring procedures or sophisticated alignment tools, reducing both system complexity and assembly time while ensuring reliable electrical connections
Data Source
AI summary
A compact testing system for sockets is presented having a removable and easily replaceable DUT PCB electrically connected with the electrical testing components of the system. The DUT PCB includes a socket to receive a DUT having electrical contacts. In one or more arrangements, the system includes a housing forming a hollow interior and a motherboard. The motherboard has electrical contacts connected to the test circuitry. In one or more arrangements, the system includes a receiver in a top surface of the housing to receive and hold the DUT PCB. When the DUT is held within the socket the DUT is electrically connected to the electrical contacts of the DUT PCB. When the second circuit board is held within the receiver assembly, the DUT PCB is electrically connected with the DUT, thereby electrically connecting the test circuitry with the DUT for testing.