Patent ID: 6297294
Filing Date: 2001-10-02
Classification: C09J,G03F,H05K,Y10T

Abstract:
A method for increasing the adhesion of a photopolymerizable composition and the photopolymerized composition formed therefrom to a copper substrate,said substrate presenting at least one surface,said photopolymerizable composition being adapted for application to said at least one surface for photopolymerizing thereon and comprising (a) a photoinitator system; (b) a nongaseous, ethylenically unsaturated monomer or oligomer; and (c) a preformed macromolecular binder,said method comprising the step of adding to said photopolymerizable composition 0.01 to 1.0 percent, by weight, of an adhesion promoter, based upon the total weight of the photopolymerizable composition;said adhesion promoter consisting essentially of a aliphatic poly-carboxylic acid having 3-6 carbon atoms.