Patent ID: 8715916
Filing Date: 2014-05-06
Classification: B44C,G03F,H01L

Abstract:
1. A pattern-forming method comprising: applying a resist underlayer film-forming composition on a substrate; heating the resist underlayer film-forming composition at a temperature in a range from 300° C. to 500° C. to form a resist underlayer film; forming an intermediate layer on said resist underlayer film; applying a resist composition to said resist underlayer film on which said intermediate layer is formed to form a resist film; exposing said resist film by selectively applying radiation to said resist film; developing the exposed resist film to form a resist pattern; and dry-etching said intermediate layer, said resist underlayer film, and said substrate using said resist pattern as a mask to form a given pattern on said substrate, said resist underlayer film-forming composition comprising a base component, and a crosslinking agent having a partial structure represented by a following general formula (i), wherein X represents an oxygen atom, a sulfur atom, or —NR—, wherein R represents a hydrogen atom, an alkyl group having 1 to 9 carbon atoms, or an aryl group having 6 to 30 carbon atoms, and in a case where a plurality of X are present, each of the plurality of X is either identical or different, n R wherein said base component is a novolac resin or an acenaphthylene resin, the novolac resin having a structural unit represented by a following formula (a1), a following formula (a2), or a combination thereof, wherein R m2 is an integer from 0 to 6, wherein a plurality of R m3 is an integer from 0 to 4, wherein a plurality of R Z represents a methylene group, a substituted or unsubstituted alkylene group having 2 to 20 carbon atoms, a substituted or unsubstituted arylene group having 6 to 14 carbon atoms, or a substituted or unsubstituted alkylene ether group, m1 is an integer from 1 to 8, wherein a plurality of Z are each identical or different when m1 is an integer from 2 to 8, and m1, m2 and m3 satisfy 1≦m1+m2≦8 and 1≦m1+m3≦8.