Patent ID: 7575846
Filing Date: 2009-08-18
Classification: C08F,G03F,Y10S

Abstract:
1. A resist polymer, which comprises a constitutional unit represented by formula (1-1) indicated below, a constitutional unit having an acid-dissociable group, and a constitutional unit having a lactone skeleton that is represented by at least one selected from the group consisting of formulas (4-1), (4-2), (4-3), (4-5), (4-6), and (4-10) indicated below: wherein, in formula (1-1), R 01 represents a hydrogen atom or a methyl group; R 03 represents a hydrogen atom or a linear or branched alkyl group having 1 to 6 carbon atoms; and each of A 01 and A 02 independently represents a hydrogen atom, or a linear or branched alkyl group having 1 to 4 carbon atoms, or A 01 and A 02 together represent —O—, —S—, —NH—, or an alkylene chain having 1 to 6 carbon atoms, wherein, in formula (4-1), R 41 represents a hydrogen atom or a methyl group; each of R 401 and R 402 independently represents a hydrogen atom, a linear or branched alkyl group having 1 to 6 carbon atoms, a hydroxy group, a carboxy group, or a carboxy group that is esterified with alcohol having 1 to 6 carbon atoms, or R 401 and R 402 together represent —O—, —S—, —NH—, or a —(CH 2 ) j — chain wherein j represents an integer between 1 and 6; i represents 0 or 1; X 5 represents a linear or branched alkyl group having 1 to 6 carbon atoms that may have, as a substituent, at least one selected from the group consisting of a hydroxy group, a carboxy group, an acyl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, a carboxy group that is esterified with alcohol having 1 to 6 carbon atoms, a cyano group, and an amino group, a hydroxy group, a carboxy group, an acyl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, a carboxy group that is esterified with alcohol having 1 to 6 carbon atoms, or an amino group; and n5 represents an integer between 0 and 4, and m represents 1 or 2, provided that when n5 is 2 or greater, X 5 may be a plurality of different groups, wherein, in formula (4-2), R wherein, in formula (4-3), R wherein, in formula (4-5), R wherein, in formula (4-6), R wherein, in formula (4-10), each of R