Non-contact coupling plate for circuit board tester

Details Non-contact coupling plate for circuit board tester Non-contact coupling plate for circuit board tester

1975-06-25

1976-08-17

Krawczewicz, Stanley T.

Electricity: measuring and testing

Conductor identification or location

Inaccessible

324 73PC, 324158R, G01R 2702

Patent

active

039756807

ABSTRACT:
A circuit circuit tester is provided for testing circuit runs of a circuit board for electrical continuity and electrical shorts. An electrical probe connected to one side of a capacitance meter is used to contact a particular circuit run, and an electrically conductive plate connected to the other side of the capacitance meter is maintained co-planar with and in close proximity to the circuit board to provide a suitable ground in the electrical test circuit, the capacitance of which circuit is a function of the electrical integrity of the circuit run. The measured capacitance is compared to a predetermined capacitance value for an identical circuit run of known acceptable quality to determine the electrical integrity of the tested circuit run.

REFERENCES:
patent: 2932790 (1960-04-01), Davis et al.
patent: 3243701 (1966-03-01), Strand
Brown, Dielectric Sensing Device, IBM Technical Disclosure Bulletin, Oct. 1959, p. 1.
Boehringer et al., Electrical Probe Control, IBM Technical Disclosure Bulletin, Nov. 1970.

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