Method of producing printed circuit boards

Details Method of producing printed circuit boards Method of producing printed circuit boards

1980-11-14

1982-04-27

Martin, Jr., Roland E.

Radiation imagery chemistry: process, composition, or product th

Electric or magnetic imagery, e.g., xerography,...

430 49, 430318, 430319, 156656, 156901, G03G 1322, B44C 122

Patent

active

043271677

ABSTRACT:
A method of producing printed circuit boards according to this invention consists of the steps of coating an electrophotographic photosensitive film on both sides of a substrate which consists of a synthetic resin plate with a conductive metal layer on each side; forming a wiring pattern of an acid-resistant toner on the photosensitive film by means of the electrophotography; and etching the substrate to remove unnecessary parts of the conductive metal layers that are not covered with the protective toner and the photosensitive film. With this method, copper-walled holes can be formed easily and accurately.

REFERENCES:
patent: 2947625 (1960-08-01), Bertelsen
patent: 3061911 (1962-11-01), Baker
patent: 4145460 (1979-03-01), Finley et al.

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