Patent ID: 9618845
Date: 2017-04-11
CPC Classifications: C07C,C07D,G03F

Claim:
1. A method of forming a resist pattern, including: applying a positive resist composition to a substrate to form a positive resist film, exposing the positive resist film and subjecting the positive resist film to an alkali development to form a first resist pattern; applying a solution containing an acid or a thermoacid generator to the substrate on which the first resist pattern is formed, so as to cover the first resist pattern, to form a structure having the first resist pattern and a first layer covering the first resist pattern; heating the structure to change the solubility of the first resist pattern in an organic solvent under action of the acid or under action of acid generated from the thermoacid generator; and after the heating, developing the structure with the organic solvent to remove a region of the first resist pattern other than the region of the first resist pattern where the solubility in the organic solvent is changed, so as to form a second resist pattern.