Rapid nondestructive testing of ceramic multilayer capacitors

A rapid nondestructive test method for ceramic multilayer capacitors made from piezoelectric materials such as barium titanate or lead-containing materials is described and evaluated. The test method is based on the internal excitation of standing acoustic waves in the capacitor. The standing waves...

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Bibliographic Details
Published in:IEEE transactions on components, hybrids, and manufacturing technology hybrids, and manufacturing technology, 1989-03, Vol.12 (1), p.121-123
Main Authors: Boser, O., Kellawon, P., Geyer, R.
Format: Article
Language:English
Subjects:
Acoustic testing
Applied sciences
Automatic testing
Barium
Capacitors
Ceramics
Electronic equipment and fabrication. Passive components, printed wiring boards, connectics
Electronics
Exact sciences and technology
Materials testing
Nondestructive testing
Nonhomogeneous media
Piezoelectric materials
Titanium compounds
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Summary:A rapid nondestructive test method for ceramic multilayer capacitors made from piezoelectric materials such as barium titanate or lead-containing materials is described and evaluated. The test method is based on the internal excitation of standing acoustic waves in the capacitor. The standing waves are severely dampened by defects such as delaminations and pores. An undampened resonance is a good indication of a defect-free ceramic multilayer capacitor. In addition, a high-speed automated test setup was evaluated that has the potential of the testing of 180000 capacitors per hour with a sorting accuracy of about 92%. In addition, the nondestructive test setup can be integrated with the standard voltage breakdown test, reducing capital investments to a minimum.< >
ISSN:0148-6411
1558-3082
DOI:10.1109/33.19025