Patent ID: 8652757

Claim:
A composition for forming a resist underlayer film of a multilayer resist film having at least three layers used in a lithography, comprising a resin represented by the following general formula (3) and having a weight-average molecular weight of 500 to 100,000, wherein: R 1 and R 2 represent the same or a different hydrogen atom, a linear, a branched, or a cyclic alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 20 carbon atoms, or an alkenyl group having 2 to 20 carbon atoms; R 3 and R 4 each represents a hydrogen atom or a glycidyl group; R 5 represents a single bond, or a linear or a branched alkylene group having 1 to 10 carbon atoms; R 6 and R 7 represent a benzene ring or a naphthalene ring; each reference character p and q represents 1 or 2; R 8 and R 9 represent a hydrogen atom, a hydroxy group, an acyl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, an alkoxycarbonyl group having 1 to 6 carbon atoms, a carbonyl group, an amino group, an imino group, a hydroxy group substituted with an acid-labile or a glycidyl group, or a linear, a branched, or a cyclic alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 20 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, or an alkynyl group having 2 to 10 carbon atoms; R 10 and R 11 represent a benzene ring or a naphthalene ring; R 13 and R 14 represent a hydrogen atom, a hydroxy group, or a linear, a branched, or a cyclic alkyl group having 1 to 10 carbon atoms, wherein R 13 and R 14 may be bonded to form a ring; R 12 and R 15 represent a linear or a branched alkylene group having 1 to 10 carbon atoms; reference character s represents 1 or 2; and reference characters n, m, and r respectively represent molar ratios of components in the resin of formula (3) and satisfy 0<n<1.0, 0<m<1.0, 0≦r<1.0, and 0<m+r<1.0.