Patent ID: 6811817
Filing Date: 2004-11-02
Classification: G03F

Abstract:
A method for reducing dimensions of a resist pattern on a substrate surface which comprises the steps of:(a2) coating the patterned resist layer with an aqueous coating solution containing a water-soluble resin which is a copolymer of N-vinylpyrrolidone and a comonomer which is N-vinylimidazolidinone, N-acryloylmorpholine or a combination thereof to form a coating layer of the aqueous coating solution; (b2) drying the coating layer to form a dried coating layer of the water-soluble resin; (c2) subjecting the dried coating layer to a heat treatment to effect thermal shrinkage of the coating layer and reduction of the resist pattern dimension; and (d2) dissolving away the coating layer completely by washing with water.