Method for producing a resin rich epoxy prepreg and laminate

Details Method for producing a resin rich epoxy prepreg and laminate Method for producing a resin rich epoxy prepreg and laminate

1975-06-04

1977-05-17

Hoffman, James R.

Coating processes

With post-treatment of coating or coating material

Heating or drying

427412, B05D 138

Patent

active

040243052

ABSTRACT:
A method for producing a resin rich epoxy-glass prepreg and laminate wherein the epoxy-glass prepreg is given a first pass through an impregnation tower and impregnated with dicyandiamide cured brominated bisphenol type epoxy modified with a polyfunctional additive and advanced to 80-85% of complete cure. The prepreg is given a second pass through the tower and given a dip coating of, for example, brominated bisphenol A which is advanced to 80-85% of complete cure. The resulting prepreg serves as the outer sheet of a multi-layer printed circuit board and it has a resin rich surface necessary for chemical roughening and subsequent additive plating.

REFERENCES:
patent: 2956613 (1960-10-01), Edelman et al.
patent: 3523037 (1970-08-01), Chellis
patent: 3698940 (1972-10-01), Mersereau
patent: 3808028 (1974-04-01), Lando

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