Patent ID: 6602804
Filing Date: 2003-08-05
Classification: C08J,H05K,Y10S

Abstract:
A method of manufacturing an integrated circuit comprising the steps of: a) depositing on a substrate a layer of a composition comprising polymerizable B-staged dielectric material having cross-linked polymeric porogen particles having a mean particle size of 1 to 200 nm dispersed therein; b) curing the B-staged dielectric material to form a dielectric matrix material without substantially removing the porogen particles; and c) subjecting the dielectric matrix material to conditions which at least partially remove the porogen particles to form a porous dielectric material layer without substantially degrading the dielectric material; wherein the porogen particles contain from 1 to 100% cross-linking agent based on the weight of the porogen, wherein the porogen particles are not reacted with the B-staged dielectric material, and wherein the porogen particles are soluble or miscible in the B-staged dielectric material, the solvent used to dissolve the B-staged dielectric material, or both.