Apparatus and method for inspecting electrical continuity of circuit board, jig for use therein, and recording medium thereon
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United States of America Patent
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Sep 20, 2005
Issued Date -
N/A
app pub date -
Sep 22, 2004
filing date -
May 23, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention provides an apparatus and method for inspecting electrical continuity of a circuit board, capable of decreasing the impedance in a current path as an inspection object to achieve enhanced SN ratio. A coupling capacitance is formed at one of terminals of a pattern wire on a board as an inspection object in a non-contact manner, and an inductance (450) and a lead wire are connected to this capacitance. An AC inspection signal is applied to the other terminal through the lead wire in a contact manner. A resonance circuit is defined by the capacitance, inductance and pattern wire, and thereby an output signal can be detected with lowering the impedance.
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