Process for the production of metal patterns on insulating subst

Details Process for the production of metal patterns on insulating subst Process for the production of metal patterns on insulating subst

1985-05-06

1987-05-19

Smith, John D.

Coating processes

Electrical product produced

Integrated circuit, printed circuit, or circuit board

204 141, 204 384, 427 98, 427305, 427306, 427307, 430315, H05K 318, H05K 342

Patent

active

046667393

ABSTRACT:
A process is described for the production of metal patterns on insulating substrates, especially of printed circuits, in which the substrates are provided with holes by means of electrical connections and the metal patterns are produced on the surface of the substrate with the aid of a negative mask in accordance with the subtractive process, said process being characterized by the following steps:

REFERENCES:
patent: 4039714 (1977-08-01), Roubal
patent: 4285991 (1981-08-01), Gedrat
patent: 4308301 (1981-12-01), Huss
patent: 4325780 (1982-04-01), Schulz
patent: 4520046 (1985-05-01), McCaskie

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