Patent ID: 6689543
Filing Date: 2004-02-10
Classification: B23K,B41M,H05K,Y10S

Abstract:
A process for manufacturing an interconnect structure containing a build-up dielectric layer containing at least one opening comprising the steps of:a) providing a substrate, b) coating the substrate with a dielectric composition for making interconnect films, said composition comprising: 1) an epoxy base resin consists essentially of: (i) between about 10% and about 80% by weight of a polyol resin which is a condensation product of epichlorohydrin and bisphenol A; (ii) about 0% to about 80% by weight of a multifunctional bisphenol A formaldehyde novalak resin; (iii) about 10% to about 50% by weight of a glycidyl ether of bisphenol A; and (iiii) about 10% to about 35% of a liquid epoxy resin 2) from about 0.1 to about 15 parts by weight per 100 parts of a curing agent capable of initiating polymerization of said epoxy base resin; 3) from about 0.01 to about 1 parts by weight of a dye having a substantial absorbtivity at the wavelength of emission of the light of a laser beam; c) curing the film; and d) forming at least one opening in the dielectric composition by laser ablation.