Patent ID: 8057981

Claim:
A resist composition comprising: (A) 0.5 to 10 parts by weight of a polymer comprising repeat units of the general formulae (1a) and (1b), (B) 100 parts by weight of a polymer having a lactone ring and/or maleic anhydride-derived structure which becomes soluble in an alkaline developer under the action of an acid, (C) a compound capable of generating an acid upon exposure to high-energy radiation, and (D) an organic solvent, wherein R 1 is hydrogen, fluorine, or straight or branched C 1 -C 4 alkyl or fluoroalkyl, R 2a and R 2b are each independently hydrogen or straight, branched or cyclic C 1 -C 10 alkyl, R 3 is a straight, branched or cyclic C 1 -C 10 alkyl or an acid labile group, and the subscripts a1 and a2 are numbers satisfying 0â‰¦a1<1, 0<a2<1, and 0<a1+a2â‰¦1.