Polymeric compound, positive resist composition, and method of forming resist pattern

摘要

A polymeric compound including a structural unit (a0) represented by the structural unit (a0-1) shown below: (in the formula (a0-1), R1 represents a hydrogen atom, a lower alkyl group, or a halogenated lower alkyl group; R5 represents an alkyl group; R6 represents a substituent selected from the group consisting of an alkyl group, an alkoxy group, a halogen atom and a halogenated alkyl group; and e represents an integer of 0 to 5).