Printed circuit board

Details Printed circuit board Printed circuit board

1975-08-12

1976-05-04

Cannon, J. C.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

174 685, 427 98, 427 99, 427306, 428251, 428252, 428267, 428268, 428272, 428273, 428414, 428415, 428416, 428420, 428482, 428901, B32B 1508, B32B 2704, B32B 2738, H05K 100

Patent

active

039550249

ABSTRACT:
A method of improving the dimensional and thermal stability of a fibrous web containing substrate is disclosed. A uniformly or randomly spun or bonded fabric or textile support is impregnated with a curable polymer resin, e.g., an epoxy-polyester resin. The impregnated resin is then fully cured whereupon a polymer resin coat is applied thereto. The coat is maintained in a partial cure state whereby a laminate comprising an internal woven or bonded fabric skeleton impregnated with a fully cured polymer resin and coated with a layer of a partially cured polymer resin is obtained.

REFERENCES:
patent: 3027279 (1962-03-01), Kurka et al.

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