Patent ID: 7655378

Claim:
A negative resist composition comprising, at least, a polymer comprising a repeating unit of hydroxy vinylnaphthalene represented by the following general formula (1) and a repeating unit represented by the following general formula (1)-2, wherein R 1 represents a hydrogen atom or a methyl group, m represents 1 or 2, a satisfies 0<a<1, R 8 represents a hydrogen atom, a fluorine atom, a methyl group, or a trifluoromethyl group, Y 1 represents a single bond, a benzene ring, —O—, —C(═O)—O—, or —C(═O)—O —R 18 —C(═O)—O—, R 18 represents a linear, branched or cyclic alkylene group having 1-10 carbon atoms that may optionally have an alkylene group substituted with a fluorine atom or a trifluoromethyl group, R 16 represents a single bond, or a linear, branched or cyclic alkylene group having 1-10 carbon atoms that may optionally be substituted with a fluorine atom and that may optionally have a hydroxyl group, R 17 represents a hydrogen atom, a fluorine atom, a methyl group, a trifluoromethyl group, or a difluoromethyl group; R 17 may be linked to R 16 to form a ring, and the ring may have one or more of an ether group, an alkylene group substituted with a fluorine atom and a trifluoromethyl group, n 1 represents 1 or 2, and c satisfies 0<c<1.