Circuit board manufacture

Details Circuit board manufacture Circuit board manufacture

1993-12-13

1995-10-10

Wieder, Kenneth A.

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

Of individual circuit component or element

3241581, 324554, 324755, 324557, 324719, 29593, G01R 2900

Patent

active

054573904

ABSTRACT:
To determine the stabilized surface insulation resistance (SIR) of a printed circuit board substrate, a test printed circuit board is provided which has desirable clean surface conditions. This surface bears a predetermined circuit board test pattern and has a known SIR characteristic resulting in a known stabilized SIR. The test board is then subjected to a soldering step which is performed in the same in-line production with commercial boards. After the soldering step, the SIR characteristic of the soldered test board is determined for a time period sufficient for a comparison with the SIR characteristic of the clean test board to enable the stabilized SIR of the soldered test board to be determined.

REFERENCES:
patent: 3599092 (1971-08-01), Silverman
patent: 3665504 (1972-05-01), Silverman
patent: 4386459 (1983-06-01), Boulin
patent: 4730160 (1988-03-01), Cusack

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