Patent ID: 7771913

Claim:
A resist composition at least comprising: a base resin; and a polymer including repeating units represented by the following general formula (1) wherein the total mass of the polymer to be added to 100 parts by mass of the base resin of the resist composition is 0.5 to 10 parts by mass, wherein R 1 and R 2 independently represent a hydrogen atom, or a linear, branched or cyclic alkyl group having 1 to 4 carbon atoms; R 1 and R 2 may bond together to form a ring, and in the case of R 1 and R 2 forming a ring, R 1 and R 2 together represent a divalent organic group having 2 to 4 carbon atoms, provided that R 1 and R 2 are not both hydrogen atoms; R 3 , R 4 , R 11 , and R 14 independently represent a hydrogen atom or a methyl group; R 5 represents a linear, branched or cyclic alkyl group having 1 to 5 carbon atoms, in which some or all hydrogen atoms may be optionally substituted with fluorine atoms, and the alkyl group may include an iminosulfonyl group; X 1 , X 2 , X 3 , and X 4 independently represent any one of —C(═O)—, —C(═O)—O—, —C(═O)—O—R 6 —, —O—, —C(═O)—R 6 —C(═O)—, and —C(═O)—O—R 6 —C(═O)—O—; R 6 represents a linear, branched or cyclic alkylene group having 1 to 10 carbon atoms; R 12 represents an alkylene group or an alkanetriyl group that includes a cyclic structure having 4 to 12 carbon atoms, and the group may be optionally substituted with a fluorine atom; R 13 represents a hydrogen atom, or a linear or branched alkyl group having 1 to 10 carbon atoms in which the group may optionally be substituted with a fluorine atom; R 12 and R 13 may bond together to form a ring having 3 to 12 carbon atoms; R 15 represents a hydrogen atom, or a linear or branched alkyl group having 1 to 10 carbon atoms in which the group may optionally be substituted with a fluorine atom; n1 represents 1 or 2; and a-1, b-1, b-2, and b-3 satisfy the range of 0<(a-1)<1, 0≦(b-1)<1, 0≦(b-2)<1, 0<(b-3)<1, 0<(a-1)+(b-1)+(b-2)+(b-3)≦1.