Patent ID: 9029069
Filing Date: 2015-05-12
Classification: G03F

Abstract:
1. A resist underlayer film-forming composition comprising: a polymer comprising a structural unit shown by a formula (1), and having a polystyrene-reduced weight average molecular weight of from 3000 to 10000; and a solvent, wherein each of R X represents a substituted or unsubstituted alkanediyl group having 1 to 10 carbon atoms, a substituted or unsubstituted cycloalkanediyl group having 3 to 20 carbon atoms, a substituted or unsubstituted alkanediyloxy group having 1 to 10 carbon atoms, a substituted or unsubstituted cycloalkanediyloxy group having 3 to 20 carbon atoms, a substituted or unsubstituted arenediyl group having 6 to 14 carbon atoms, or a divalent group formed by an arbitrary combination thereof, wherein R R