Patent ID: 6376154
Filing Date: 2002-04-23
Classification: G03F

Abstract:
A pattern forming method comprising:a first step of forming a resist film by coating a semiconductor substrate with a pattern forming material including a copolymer having a first group for generating an acid through irradiation with a first energy beam having a first energy band and a second group for generating a base through irradiation with a second energy beam having a second energy band different from said first energy band; a second step of selectively irradiating said resist film with said first energy beam by using a mask having a desired pattern, and generating said acid in an exposed area of said first energy beam on said resist film; a third step of irradiating an entire surface of said resist film with said second energy beam, generating said base on the entire surface of said resist film, and neutralizing said generated base with said acid generated in said exposed area of said first energy beam on said resist film; a fourth step of supplying metal alkoxide onto said resist film and forming a metal oxide film on a surface of an unexposed area of said first energy beam on said resist film; and a fifth step of forming a resist pattern by dry-etching said resist film by using said metal oxide film as a mask.