Patent ID: 7378229

Claim:
A pattern formation method comprising the steps of: forming a resist film on a substrate, said resist including a carboxylic acid derivative; performing pattern exposure by selectively irradiating with exposing light; forming a first resist pattern by developing said resist film after the pattern exposure; forming, on said first resist pattern, a water-soluble film including a reducing agent for reducing said carboxylic acid derivative and a crosslinking agent which reacts with said first resist pattern; annealing said water-soluble film; removing a first portion of said water-soluble film; and forming a second resist pattern having said first resist pattern and a second portion of said water-soluble film, wherein said first portion of said water-soluble film is a portion which does not react with said first pattern and said second portion of said water-soluble film is a portion which reacts with said first resist pattern.