Patent ID: 6309795
Filing Date: 2001-10-30
Classification: G03F

Abstract:
A pattern forming process, comprising the steps of(1) coating a substrate with a solution of a resist composition comprising a polymer (a) having structural units with an acid-labile group, and a radiation-sensitive compound (b) which forms an acid upon exposure to activated radiation, wherein the polymer (a) is a polymer obtained by polymerizing 10 to 100 weight percent of a (meth)acrylic ester (i) having, as an alcohol residue, an allyl group with at least two substituent groups, and 0 to 90 weight percent of a monomer (ii) copolymerizable with the (meth)acrylic ester;(2) drying the solution to form a resist film;(3) exposing the resist film to activated radiation according to a pattern;(4) dissolving and removing the exposed area of the resist film with an alkaline developing solution to develop the resist film; and(5) further exposing a resist pattern formed in the developing step (4) to activated radiation.