Printed circuit board base material

Details Printed circuit board base material Printed circuit board base material

1987-04-13

1988-09-20

Herbert, Thomas J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

428422, 4284735, 428901, B32B 1710, B32B 2710

Patent

active

047725095

ABSTRACT:
A printed circuit board base prepreg material is provided of a porous, expanded polytetrafluoroethylene (PTFE) membrane or fabric impregnated with a polyimide resin varnish. Upon curing, a printed circuit board base material of porous, expanded PTFE impregnated with polyimide resin is provided. The base material of the invention may be laminated to a glass fabric to improve strength and dimensional stability.

REFERENCES:
patent: 3953566 (1976-04-01), Gore
patent: 3962153 (1976-06-01), Gore
patent: 3968297 (1976-07-01), Sauer
patent: 4680220 (1987-07-01), Johnson

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