Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – Of individual circuit component or element
Patent
1995-03-24
1997-04-15
Regan, Maura K.
Electricity: measuring and testing
Fault detecting in electric circuits and of electric components
Of individual circuit component or element
324522, G01R 2726
Patent
active
056213271
ABSTRACT:
Apparatus and method are disclosed for performing testing and fault isolation of high density passive boards and substrates. Using a small number of moving probes, simultaneous network resistance and network capacitance measurements may be performed. Thus, test time is minimized by eliminating the need for electrical switching and/or excessive probe movement during the test of a normal circuit board network. Simultaneous network capacitance and network leakage measurement are also achieved using phase-sensitive detection. Dual-frequency measurement techniques allow the measurement of both the capacitance value and resistance value of a leakage path between a network being measured and an unknown network. Any leakage resistance between a network under test and ground or power planes within the circuit board may also be determined from the measurements. Simultaneous independent net-to-plane capacitance characterization is also achieved using signals of mutually independent frequencies accompanied by minimal signal processing. Thus, improved defect detection capabilities are obtained.
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Chiang Shinwu
Curtis Huntington W.
Falls Arthur E.
Halperin Arnold
Karidis John P.
International Business Machines - Corporation
Regan Maura K.
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