Method of testing substrate for liquid jet recording head

Details Method of testing substrate for liquid jet recording head Method of testing substrate for liquid jet recording head

1993-11-08

1995-10-10

Wieder, Kenneth A.

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

For fault location

324765, 324557, H01L 21306

Patent

active

054573890

ABSTRACT:
A method for detecting an insulative condition of a protection layer of a substrate includes the steps of contacting an area of a surface of a protection layer to be detected with a liquid, and checking the electrical conduction between the liquid and a detection electrode which is electrically connected with an electrical element at an area on which the protection layer is not provided.

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patent: 4672314 (1987-06-01), Kokas
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patent: 5013394 (1991-05-01), Rolland
patent: 5097205 (1992-03-01), Toyoda
Bogardas et al. Pinhole Detector In Insulating Films, Apr. 1978, IBM Tech. Disc. Bull, vol. 20, No. 11B, pp. 4967-4968.

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