Patent ID: 8450048

Claim:
A method for forming a resist underlayer film of a multilayer resist film having at least three layers used in a lithography, comprising at least: a step of coating a substrate with a composition for a resist underlayer film containing a novolak resin represented by the following general formula (1) obtained by treating a compound having a bisnaphthol group; and a step of curing the coated composition for a resist underlayer film by a heat treatment at a temperature above 300° C. and 600° C. or lower for 10 to 600 seconds, 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; and a reference character n is 0<n≦1, wherein n represents a mole ratio of components in the novolak resin.