Nondestructive testing of multilayer ceramic capacitors

Details Nondestructive testing of multilayer ceramic capacitors Nondestructive testing of multilayer ceramic capacitors

1984-10-31

1987-02-17

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

324 56, G01R 3102

Patent

active

046442596

ABSTRACT:
A method for nondestructive testing of multilayer ceramic capacitors exhibiting piezoelectric effects only during poling by a bias voltage to determine the presence or absence of delaminations. The capacitor is inserted in an impedance bridge, a bias voltage of 1 to 2.5 times the rated voltage is applied and the impedance is measured as a function of frequency. A lower than expected impedance indicates a defective capacitor.

REFERENCES:
patent: 3230448 (1966-01-01), Norrelgen
patent: 3832630 (1974-08-01), Micol et al.
patent: 4583038 (1986-04-01), Chittick
Baker, Multilayer Ceramic Capacitors Testing Methods, Bell Laboratories Inc., Jul. 1980, pp. 1-99.

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