Process for producing a printed wiring board

Details Process for producing a printed wiring board Process for producing a printed wiring board

1995-06-05

1997-06-17

Vo, Peter

Metal working

Method of mechanical manufacture

Electrical device making

29846, 174262, H01K 310

Patent

active

056385986

ABSTRACT:
A process for producing a wiring board involves laminating a metal foil on both sides of an insulating substrate not completely cured, followed by pressing with heating; drilling holes in the resulting laminate for connecting circuits therein; removing portions of the metal foils in narrow areas around the holes to form hollow portions in the metal foils; and filling a flowable electroconductive substance in the holes and the hollow portions.

REFERENCES:
patent: 3357099 (1967-12-01), Nagy et al.
patent: 4374868 (1983-02-01), Stahl et al.
patent: 4821007 (1989-04-01), Fields et al.
patent: 4859806 (1989-08-01), Smith
patent: 5072075 (1991-12-01), Lee et al.

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