Patent ID: 8859187
Filing Date: 2014-10-14
Classification: G03F,H01L

Abstract:
1. A method of forming a resist pattern, comprising: forming a first resist film by applying a first resist composition to a support, forming a first resist pattern by selectively exposing said first resist film through a first mask pattern and then developing said first resist film, forming a second resist film by applying a negative resist composition comprising a solvent consisting of an ether-based organic solvent (S″) having no hydroxyl groups, wherein said solvent is at least one solvent selected from the group consisting of 1,8-cineole, dibutyl ether, and diisopentyl ether, onto said support having said first resist pattern formed thereon, and forming a resist pattern by selectively exposing said second resist film through a second mask pattern and then developing said second resist film, wherein said negative resist composition is prepared by dissolving an alkali-soluble resin component (A″) comprising a resin(A2) unit containing an aliphatic cyclic group having a fluorinated hydroxyalkl group and a structural unit derived from an acrylate ester containing a hydroxyl group-containing aliphatic cyclic group, an acid generator component (B) that generates acid upon exposure, and a cross-linker component (C) in said ether-based organic solvent (S″).