Patent ID: 8846838

Claim:
An additive for a resist composition, comprising: a fluorine-containing polymeric compound comprising a structural unit (f1) represented by general formula (f1-1-1) or (f1-1-2) shown below as a block copolymer portion and at least one structural unit selected from the group consisting of a structural unit (a0) represented by general formula (a0-1) shown below, a structural unit (a1) derived from an acrylate ester containing an acid dissociable, dissolution inhibiting group, a structural unit (a2) derived from an acrylate ester containing a lactone-containing cyclic group, a structural unit (a3) represented by any one of formulae (a3-1) to (a3-3) shown below, a structural unit (a4) represented by any one of formulae (a4-1) to (a3-5) shown below, and a structural unit represented by general formula (a5-1) shown below: wherein each R independently represents a hydrogen atom, an alkyl group of 1 to 5 carbon atoms or a halogenated alkyl group of 1 to 5 carbon atoms; X represents a linear or branched alkylene group or a linear or branched fluorinated alkylene group; A aryl represents a divalent aromatic group which may have a substituent; X 01 represents a divalent linking group which may have a substituent; and R 2 represents a group represented by general formula (III-1) or (III-2) shown below: wherein R 41 ′ represents an unsubstituted alkylene group of 1 to 9 carbon atoms, and R 42 ′ represents a fluorinated alkyl group of 1 to 9 carbon atoms, provided that the total number of carbon atoms of R 41 ′ and R 42 ′ is no more than 10; each of R 71 to R 73 independently represents a linear alkyl group of 1 to 5 carbon atoms, with the provision that at least one of R 71 to R 73 represents an alkyl group having a fluorine atom, 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 02 represents a divalent group; and R 03 represents a cyclic group containing an —SO 2 — group within the ring skeleton thereof, 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; j is an integer of 1 to 3; k is an integer of 1 to 3; t′ is an integer of 1 to 3; 1 is an integer of 1 to 5; and s is an integer of 1 to 3, 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, and 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; and R 88 represents a divalent aliphatic hydrocarbon group of 2 to 12 carbon atoms which may have an oxygen atom.