Method of making printed circuit boards

Details Method of making printed circuit boards Method of making printed circuit boards

1990-11-20

1992-04-28

Lusignan, Michael

Coating processes

Electrical product produced

Integrated circuit, printed circuit, or circuit board

427304, 427305, 427306, 205126, 205167, C23C 2600

Patent

active

051087863

ABSTRACT:
A method for making printed circuit boards wherein the resistance of catalyzed nonconductive surfaces to solutions used in the processing stages, e.g., KOH used to remove an etch resist covering through-holes and the desired circuit lines, is enhanced by treating the catalyzed surface with an accelerator to activate the catalyst, treating the accelerated surface with a reducing agent, followed by baking.

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patent: 4234462 (1980-11-01), Harshaw
patent: 4273804 (1981-06-01), Feldstein
patent: 4592852 (1986-06-01), Enthone
patent: 4608275 (1986-08-01), Kukanskis
patent: 4668532 (1987-05-01), Moisan
patent: 4759952 (1988-07-01), Brasch
patent: 4761303 (1988-08-01), Ruszezyk
patent: 4761304 (1988-08-01), Brasch
patent: 4790912 (1988-12-01), Holtzman
patent: 4847114 (1989-07-01), Brasch
patent: 4931148 (1990-06-01), Kukanskis

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