Patent ID: 6066889
Filing Date: 2000-05-23
Classification: H01L,H05K

Abstract:
A circuitized structure comprising:a circuitized substrate;apertures disposed in said circuitized substrate;cured hole fill film disposed in said apertures;wherein the hole fill film comprises solids which comprise an epoxy resin system comprising:i. from about 10 to about 80% of phenoxy polyol resin which is the condensation product of epichlorohydrin and bisphenol A, having a molecular weight of from about 40,000 to about 130,000;ii. from about 20% to about 90% of an epoxidized multifunctional bisphenol A formaldehyde novolac resin having a molecular weight of from about 4,000 to about 10,000;iii. from 0 to 50% of a diglycidyl ether of bisphenol A having a molecular weight of from about 600 to about 2,500;from 0 to about 20% of a thixotrope.