Patent ID: 8383320

Claim:
A resist underlayer film forming composition for lithography comprising: a linear polymer having a repeating unit structure of Formula (1): (where A 1 , A 2 , A 3 , A 4 , A 5 and A 6 are independently a hydrogen atom, a methyl group or an ethyl group; n is a repeating number of the unit structure and is an integer of 10 to 10,000; and Q is a group of Formula (2): (where Q 1 is a C 1-10 alkylene group, a divalent organic group having a C 3 -10 alicyclic hydrocarbon, a phenylene group, a naphthylene group or an anthrylene group, where the phenylene group, the naphthylene group and the anthrylene group are optionally substituted independently with at least one group selected from a 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)); and a solvent.