Patent ID: 9212255
Filing Date: 2015-12-15
Classification: C08G,C09D,G03F,H01L

Abstract:
1. A resist underlayer film-forming composition for lithography, comprising: a polymer that has a structure of Formula (1a), Formula (1b), or Formula (2) below on an end of the polymer; and an organic solvent: where R 1 is a hydrogen atom or a methyl group; each of R 2 and R 3 is independently a hydrogen atom, a linear or branched hydrocarbon group having a carbon atom number of 1 to 6, an alicyclic hydrocarbon group, a phenyl group, a benzyl group, a benzyloxy group, a benzylthio group, an imidazole group, or an indole group; each of the hydrocarbon group, the alicyclic hydrocarbon group, the phenyl group, the benzyl group, the benzyloxy group, the benzylthio group, the imidazole group, and the indole group optionally has at least one of a hydroxy group and a methylthio group as substituent(s); R 4 is a hydrogen atom or a hydroxy group; Q 1 is an arylene group; v is 0 or 1; y is an integer of 1 to 4; w is an integer of 1 to 4; x 1 is 0 or 1; and x 2 is an integer of 1 to 5, wherein the polymer further has at least one of structure units represented by Formula (4) in a main chain of the polymer: where each of A 1 , A 2 , A 3 , A 4 , A 5 , and A 6 is independently a hydrogen atom, a methyl group, or an ethyl group; each of m 1 and m 2 is independently 0 or 1; and Q 2 is a divalent organic group of Formula (6): where X is a divalent organic group of Formula (7) or Formula (8): where each of R 6 and R 7 is independently a hydrogen atom, a C 1-6 alkyl group, a C 3-6 alkenyl group, a benzyl group, or a phenyl group, in which the phenyl group is optionally substituted with at least one selected from the group consisting of a C 1-6 alkyl group, a halogen atom, a C 1-6 alkoxy group, a nitro group, a cyano group, and a C 1-6 alkylthio group; or R 6 and R 7 are optionally bonded to each other to form a C 3-6 ring, together with a carbon atom bonded to R 6 and R 7 .