Resist composition for immersion exposure, method of forming resist pattern using the same, and fluorine-containing compound
A resist composition for immersion exposure, including a base component that exhibits changed solubility in an alkali developing solution under action of acid, an acid generator component that generates acid upon exposure, and a fluorine-containing compound represented by a general formula (c-1) that is decomposable in an alkali developing solution: wherein R 1 represents an organic group which may contain a polymerizable group, with the proviso that said polymerizable group has a carbon-carbon multiple bond, and the carbon atoms forming the multiple bond are not directly bonded to the carbon atom within the —C(═O)— group in general formula (c-1); and R 2 represents an organic group having a fluorine atom.
1. A resist composition for immersion exposure, comprising a base component (A) that exhibits changed solubility in an alkali developing solution under action of acid, an acid generator component (B) that generates acid upon exposure, and a fluorine-containing compound (C) represented by a general formula (c-1-3) or (c-1-4) shown below:
wherein each R independently represents a hydrogen atom, a lower alkyl group or a halogenated lower alkyl group; X represents a linear or branched aliphatic hydrocarbon group, a monocycloalkane having 2 hydrogen atoms removed therefrom, adamantane having 2 hydrogen atoms removed therefrom, isobornane having 2 hydrogen atoms removed therefrom, tricyclodecane having 2 hydrogen atoms removed therefrom or tetracyclododecane having 2 hydrogen atoms removed therefrom, a divalent aromatic hydrocarbon group, —O—, —C(═O)—, —C(═O)—O—, a carbonate bond (—O—C(═O)—O—), —NH—, —NR 04 —, wherein R 04 represents an alkyl group, —NH—C(═O)—, a combination of a linear or branched aliphatic hydrocarbon group or a divalent aromatic hydrocarbon group with —C(═O)—O—, or a combination of a linear, branched or cyclic aliphatic hydrocarbon group or a divalent aromatic hydrocarbon group with any of —O—, —C(═O)—, a carbonate bond (—O—C(═O)—O—), —NH—, —NR 04 — wherein R 04 represents an alkyl group, —NH—C(═O)—, A aryl represents an aromatic cyclic group which may have a substituent; X 01 represents a single bond or a divalent linkage group; and each R 2 independently represents a linear or branched fluorinated hydrocarbon group having no substituent.
2. The resist composition for immersion exposure according to claim 1 , wherein said base component (A) is a base component that exhibits increased solubility in an alkali developing solution under action of acid.
3. The resist composition for immersion exposure according to claim 2 , wherein said base component (A) comprises a resin component (A1) that exhibits increased solubility in an alkali developing solution under action of acid, and said resin component (A1) comprises a structural unit (a1) derived from an acrylate ester containing an acid dissociable, dissolution inhibiting group.
4. The resist composition for immersion exposure according to claim 3 , wherein said resin component (A1) further comprises a structural unit (a2) derived from an acrylate ester containing a lactone-containing cyclic group.
5. The resist composition for immersion exposure according to claim 3 , wherein said resin component (A1) further comprises a structural unit (a3) derived from an acrylate ester containing a polar group-containing aliphatic hydrocarbon group.
6. The resist composition for immersion exposure according to claim 1 , further comprising a nitrogen-containing organic compound (D).
7. A method of forming a resist pattern, comprising: forming a resist film using a resist composition for immersion exposure according to claim 1 , subjecting said resist film to immersion exposure, and subjecting said resist film to alkali developing to form a resist pattern.