Patent ID: 6485887
Filing Date: 2002-11-26
Classification: G03F,Y10S

Abstract:
A positive-working chemical-amplification photoresist composition comprising:(A) a resinous compound capable of being imparted with an increase in the solubility in an aqueous alkaline solution by interacting with an acid and consisting essentially of (a) hydroxystyrene units or hydroxy-&agr;-methylstyrene units, (b) styrene units and (c) 1-alkylcyclohexyl (meth)acrylate units represented by the general formula in which R1 is a hydrogen atom or a methyl group and R2 is an alkyl group having 1 to 5 carbon atoms; and(B) a radiation-sensitive acid-generating agent capable of releasing an acid by irradiation with actinic rays, and capable of forming, on a substrate surface, a layer of which the rate of thickness reduction by dissolution at 23Â° C. in a 4.5% by weight aqueous solution of tetramethylammonium hydroxide is in the range from 0.01 to 100 nm per second.