Method and composition for applying coatings on printed circuit

Details Method and composition for applying coatings on printed circuit Method and composition for applying coatings on printed circuit

1983-01-07

1984-10-30

Newsome, John H.

Coating processes

Electrical product produced

Welding electrode

20415916, 427 96, 427282, B05D 306

Patent

active

044799837

ABSTRACT:
A coating is produced by a method including a screen printing of a photopolymerizable composition on a printed circuit board, illuminating said composition to partially polymerize it and bake it to complete the polymerization.
The composition used by said method contains a reaction product of a monoethylenically unsaturated carboxylic acid with a material of the group of epoxy resin and epoxidized novolak, a phenoxy resin, a thickening agent, a polyethylenically unsaturated compound, a photo-initiator and a solvent.
The coating produced according to this invention is used as solder mask.

REFERENCES:
patent: 4074008 (1978-02-01), Green
patent: 4169732 (1979-10-01), Shipley
patent: 4208005 (1980-06-01), Nate et al.
patent: 4292230 (1981-09-01), Kenney et al.

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