Syntest Technologies, Inc.

Xiaqing Wen

Po-Ching Hsu

Laung-Terng Wang

Hsin-Po Wang

Meng-Chyi Lin

Shih-Chia Kao

Hao-Jan Chao

Luang-Terng Wang

A method for providing ordered capture clocks to detect or locate faults within N clock domains and faults crossing any two clock domains in an integrated circuit or circuit assembly in scan-test or self-test mode, where N&#x3e;1, each clock domain having one capture clock and a plurality of scan cells, each capture clock comprising a plurality of capture clock pulses; said method comprising: (a) generating and shifting-in N test stimuli to all said scan cells within said N clock domains in said integrated circuit or circuit assembly during a shift-in operation; (b) applying an ordered sequence of capture clocks to all said scan cells within said N clock domains, the ordered sequence of capture clocks comprising at least a plurality of capture clock pulses from two or more selected capture clocks placed in a sequential order such that all clock domains are never triggered simultaneously during a capture operation; and (c) analyzing output responses of all said scan cells to locate any faults therein.

Multiple-capture DFT system for detecting or locating crossing clock-domain faults during self-test or scan-test

Computer-aided design (CAD) multiple-capture DFT system for detecting or locating crossing clock-domain faults

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Sunnyvale, CA, United States of America

Xiaqing Wen