Patent ID: 7659050
Filing Date: 2010-02-09
Classification: G03F

Abstract:
1. A method of forming a structure on a substrate, said method comprising: (a) providing a substrate; (b) applying a non-chemically amplified resist composition to said substrate to form a resist layer on said substrate; said resist composition consisting essentially of (i) an organosilsesquioxane polymer having a silsesquioxane backbone and pendent from a silsesquioxane backbone at least one radiation-sensitive moiety cleavable upon irradiation to form an aqueous base-soluble moiety, and (ii) a casting solvent, wherein said radiation sensitive moiety is selected from the group consisting of carbonyl, diazo, sulfonyl, alkanethiol, and O-nitrobenzyl, (c) patternwise exposing said substrate to imaging radiation, whereby said radiation sensitive moiety is cleaved to form aqueous base soluble moiety whereby portions of said resist layer become preferentially more soluble in aqueous base, (d) removing said soluble portions of said resist layer to form a pattern of spaces in said resist layer, and (e) transferring said pattern of spaces to said substrate.