Process for preparing polymeric materials for application to pri

Details Process for preparing polymeric materials for application to pri Process for preparing polymeric materials for application to pri

1989-03-02

1990-06-26

Ryan, Patrick

Stock material or miscellaneous articles

Sheet including cover or casing

428 76, 428198, 428522, 428901, 428906, 206328, 206330, 206332, 427 96, 156233, 156234, B32B 302

Patent

active

049371215

ABSTRACT:
A process for preparing curable, aqueous strippable, polymeric materials for application, in succession, as masks, to a specific area of each of a plurality of printed circuit boards that is to be protected from the stripping and plating processes associated with gold finger plating, during the fabrication thereof, includes forming a coating of substantially identical, uniformly spaced, areas of polymeric material on a continuous length of carrier web, applying a cover coating over the carrier web and the uniformly spaced areas of polymeric material with the cover coating having a width substantially the same as that of the carrier film, and winding up in a roll the continuous length of carrier web and the cover coating with the uniformly spaced polymeric material sandwiched therebetween.

REFERENCES:
patent: 4657137 (1987-04-01), Johnson

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