Patent ID: 9134617
Filing Date: 2015-09-15
Classification: B82Y,C08F,G03F

Abstract:
1. A method of forming a resist pattern, comprising: using a solvent developing negative-tone resist composition to form a resist film on a substrate, conducting exposure of the resist film, and developing the resist film using a developing solution containing an organic solvent to form a resist pattern, the resist composition comprising a base component (A) which exhibits reduced solubility in an organic solvent under action of an acid and an acid generator component (B) which generates an acid upon exposure, conducting exposure of the resist film, and patterning the resist film by a negative tone development using a developing solution containing an organic solvent, the component (A) comprising a resin component (A1) comprising: at least one structural unit (a2) selected from the group consisting of structural units represented by formulae (a22-1) to (a22-3) shown below; wherein R represents a hydrogen atom, an alkyl group of 1 to 5 carbon atoms or a halogenated alkyl group of 1 to 5 carbon atoms; R a structural unit (a1) that is derived from an acrylate ester containing an acid decomposable group which exhibited increased polarity by the action of acid and may have the hydrogen atom bonded to the carbon atom on the α-position substituted with a substituent; and the acid generator component (B) comprising an acid generator (B1) containing a compound which generates a sulfonic acid upon exposure.