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In this paper, we propose a test method for detecting pin opens of CMOS logic ICs in assembled PCBs. The test method is based on supply current of a circuit under test which flows when a time-varying signal is provided to a targeted pin with a test probe as a stimulus. Test signal's amplitude is less than VDD. Test vector generations are not needed for the tests. In the test, the test probe also can...
In this paper, a built-in test circuit of electrical tests is proposed to detect pin opens of CMOS ICs. When a circuit is tested by the test method, current is made to flow through a targeted pin. An open defect is detected by means of the difference between the current of a defect-free circuit and the measured one. Feasibility of tests with the built-in supply current test circuit is examined by...
In this paper, a built-in test circuit is proposed to detect open defects that occur at interconnects between dies inside 3D ICs. An inverter gate is used in the test circuit as an open sensor. Open defects are detected by means of supply current of the inverter gate flowing when an AC voltage signal is provided to targeted interconnects as a stimulus. The interconnect at which an open defect occurs...
In this paper, a method for reducing test data volume of BIST-aided scan test (BAST) is proposed. In our BAST method, scan chains are ordered using compatible flip-flops to reduce the conflicting bits between ATPG pattern and random pattern obtained by LFSR. The inverter block in BIST-aided scan architecture is modified for shifting inverter code such that the random pattern produced by LFSR has less...
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