Patent ID: 7556908
Filing Date: 2009-07-07
Classification: C07C,C07D,C08F,G03F,Y10S

Abstract:
1. A chemically amplified positive resist composition comprising (A) a resin which comprises (i) a structural unit of the formula (IX) wherein X (ii) a structural unit of the formula (VIII) wherein X 7 represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms or a perfluoroalkyl group having 1 to 4 carbon atoms, R 8 represents an alkyl group having 1 to 4 carbon atoms or an alkoxy group having 1 to 4 carbon atoms, s represents an integer of 0 to 2, and (B) an acid generator, wherein the acid generator is triphenylsulfonium 1-(3-hydroxymethyl-adamantane)methoxycarbonyldifluoromethanesulfonate, triphenylsulfonium 1-(hexahydro-2-oxo-3,5-methano-2H-cyclopenta[b]furan-6-yloxycarbonyl)difluoromethanesulfonate or triphenylsulfonium 4-oxo-1-adamantyloxycarbonyldifluoromethanesulfonate.