Patent ID: 8663898

Claim:
A resist underlayer film composition, wherein the composition contains a polymer obtained by condensation of only: one or more compounds represented by the following general formulae (1-1) and/or (1-2): one or more compounds represented by the following general formula (2): and one or more compounds represented by the following general formula (3), and/or an equivalent body thereof: Y—CHO (3), wherein: R 1 to R 8 independently represent any of a hydrogen atom, a halogen atom, a hydroxyl group, an isocyanato group, a glycidyloxy group, a carboxyl group, an amino group, an alkoxyl group having 1 to 30 carbon atoms, an alkoxy carbonyl group having 1 to 30 carbon atoms, and an alkanoyloxy group having 1 to 30 carbon atoms, or an optionally-substituted saturated or unsaturated organic group having 1 to 30 carbon atoms, wherein two substituent groups arbitrarily selected from each of R 1 to R 4 or R 5 to R 8 may be bonded to further form a non-aromatic cyclic substituent group within a molecule; X represents an integer of 2 to 4; and Y represents a hydrogen atom or an optionally-substituted monovalent organic group having 1 to 30 carbon atoms.