Patent ID: 8124314

Claim:
A radiation-sensitive composition comprising (A) a first polymer alkali-soluble through an action of an acid and with substantially no fluorine atom; (B) a second polymer having a repeating unit (b1) shown by a following formula (1) and a fluorine-containing repeating unit (b2), a content of the second polymer (B) in the composition being about 0.1 parts to about 20 parts by mass relative to 100 parts by mass of the first polymer (A); and (C) a radiation-sensitive acid generator, wherein R 1 represents a hydrogen atom, a methyl group, or a trifluoromethyl group, and R 2 represents a linear or branched alkyl group having 1 to 12 carbon atoms, a cycloalkyl group having 3 to 12 carbon atoms, an alkylcarbonyl group having 2 to 12 carbon atoms, or a hydroxyalkyl group having 1 to 12 carbon atoms, and wherein the repeating unit (b2) comprise at least one of a repeating unit shown by a following formula(2) and a repeating unit shown by a following formula (3), wherein R 3 represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, a trifluoromethyl group, or a hydroxymethyl group, R 4 represents a divalent linear, branched, or cyclic hydrocarbon group, and R 5 represents a linear, branched, or cyclic alkyl group having 1 to 12 carbon atoms in which at least one hydrogen atom is substituted by a fluorine atom.