Patent ID: 7342053

Claim:
A process for producing a printed circuit board, comprising: (a) coating a resin composition on a circuit substrate, said resin composition comprising: (i) at least one aromatic cyanate compound having two or more cyanato groups in a molecule; and (ii) at least one radical-polymerizable resin, to obtain a resin composition layer; (b) photo-curing said resin composition layer, to obtain a photo-cured resin; and (c) thermally curing said photo-cured resin, to form an insulation layer, wherein said at least one radical-polymerizable resin comprises at least one selected from the group consisting of a vinylbenzyl compound, a vinylbenzyl ether compound, and mixtures thereof, and has a weight average molecular weight of from 1,500 to 50,000.