Dual-Tester Semiconductor Package Testing System
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Solution Overview
Problem
Current semiconductor package testing methods are inefficient, requiring significantly longer times for functional tests of memory chips, which hampers productivity and testing efficiency, especially when performing tests on multiple packages simultaneously.
Innovation Solution
A dual-test system comprising a first tester for rapid DC tests and a second tester for functional tests, utilizing distinct contactor modules to align with inner and outer terminal groups of semiconductor packages, allowing simultaneous testing of multiple packages without the need for sockets, thereby optimizing test time and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If functional tests are performed on semiconductor packages using conventional single-tester methods, then test coverage is achieved, but testing time becomes excessively long (hundreds of seconds to thousands of seconds per package)
Solution Approach 1:
The testing system is divided into two independent testers: a first tester for DC electrical characteristic tests and a second tester for functional tests. Each tester handles specific test types independently, allowing parallel processing of different test categories without interfering with each other, thus reducing total testing time while maintaining comprehensive test coverage.
Solution Approach 2:
Multiple testers are combined to work simultaneously on the same semiconductor package. The first tester performs DC electrical characteristic tests while the second tester performs functional tests at the same time, merging testing capabilities to achieve parallel execution and dramatically reduce overall test time from hundreds/thousands of seconds to a much shorter duration.
2Reliability
If multiple semiconductor packages are tested sequentially using conventional methods, then each package receives thorough testing, but productivity remains low due to the time required for each individual test
Solution Approach 1:
The testing workflow is segmented into parallel test streams handled by different testers. While one package undergoes functional testing on the second tester, another package can simultaneously undergo DC electrical characteristic testing on the first tester, enabling multiple packages to be processed concurrently and significantly improving productivity without sacrificing test thoroughness.
Solution Approach 2:
The dual-tester system enables continuous testing operations where the first tester and second tester operate simultaneously and independently. This continuous parallel operation eliminates idle time between test sequences and maintains constant productivity, allowing thorough testing of multiple packages to occur without interruption or sequential delays.
3Adaptability or versatility
If conventional testing equipment with sockets is used, then device compatibility is maintained, but test setup complexity and time increase
Solution Approach 1:
The invention extracts and eliminates the socket component from the testing system. By using direct probe contact with the semiconductor package terminals, the system removes the intermediate socket interface, thereby reducing setup complexity and eliminating socket-related alignment and positioning issues while maintaining the ability to test various package types.
Solution Approach 2:
The invention replaces the socket intermediary with direct probe contact. Instead of using a socket as a mediating component between the tester and the semiconductor package, the system employs direct electrical probes that contact the package terminals, simplifying the interface and reducing the number of components involved in the test setup while preserving device compatibility.
Data Source
AI summary
A semiconductor integrated circuit test system can include a first semiconductor integrated circuit tester configured to conduct a first test of a first characteristic of one of a plurality of semiconductor integrated circuits, wherein the first test is completed by the first semiconductor integrated circuit tester within a first test time. A second semiconductor integrated circuit tester, can be coupled to the first semiconductor integrated circuit tester, where the second semiconductor integrated circuit tester can be configured to conduct a second test of a second characteristic of each of the plurality of the semiconductor integrated circuits simultaneously, wherein the second test is completed within a second test time that is at least about two orders of magnitude more than the first test time.