Method of inspecting crack in ceramic substrate

Details Method of inspecting crack in ceramic substrate Method of inspecting crack in ceramic substrate

1997-04-30

1999-10-19

Brown, Glenn W.

Electricity: measuring and testing

For insulation fault of noncircuit elements

324525, 324693, 73799, G01N 2720

Patent

active

059695323

ABSTRACT:
A method of inspecting a crack in a ceramic substrate that is not exposed on the surface. The method can detect all cracks and make objective judgement possible by expressing the inspection result as numerical data. Conductors are disposed on both faces of a ceramic substrate, wherein one of the conductors is a conductive liquid; the insulation resistance value or an electric property dependent on the insulation resistance is measured with the conductive liquid or other conductors electrically connected to the conductive liquid which are used as electrodes.

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Machine Design, vol. 53, No. 15, 1981, Cleveland, Ohio, U.S., p. 40 XP002038073 Anonymous: "Sponge Probe Pinpoints Pinholes" *the whole document*, Jun. 1981.

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