Patent ID: 8603724

Claim:
A negative resist composition comprising at least: (A) a base polymer that is alkaline-soluble and is made alkaline-insoluble by action of an acid; (B) an acid generator; and (C) a basic component, wherein the base polymer at least contains a polymer including repeating units represented by the following: general formula (1), general formula (2), and general formula (4), and having a weight average molecular weight of 1,000 to 10,000, wherein R 1 independently represents a hydrogen atom or a methyl group; s represents 0 or 1; t represents an integer of 0 to 2; R 2 represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms; each B 1 and B 2 independently represents a single bond or an alkylene group having 1 to 10 carbon atoms which may contain one or a plurality of an ether bond in the chain of the alkylene group; and a represents an integer of 0 to 3 and b represents an integer of 1 to 3; and R 5 independently represents a hydrogen atom, a halogen atom, an optionally substituted hydroxyl group, an alkoxy group or an alkyl group, and v represents an integer of 0 to 5.