| abstract |
A silicon-based hardmask composition is provided. The hardmask composition comprises (a) an organosilane polymer and (b) a solvent. The organosilane polymer is represented by Formula 1: { (SiO1.5- Y-SiO1.5)x(R3SiO1.5)y(XSiO1.5)z}(OH)e(OR6)f (1). In Formula 1, x, y and z represent the relative ratios of the repeating units (SiO1.5- Y-SiO1.5), (R3SiO1.5) and (XSiO1.5) in the polymer and satisfy the relations 0.05 <= x <= 0.9, 0.05 <= y <= 0.9, 0 <= z <= 0.9 and x + y + z = l; e and f represent the ratios of the numbers of the terminal -OH groups and -OR groups bonded to the silicon (Si) atoms to the number of the 2x+y+z silicon (Si) atoms in the polymer, respectively, and satisfy the relations 0.03 <= e <= 0.2 and 0.03 <= f <= 0.25; X is a C6-C30 functional group containing at least one substituted or unsubstituted aromatic ring; R3 is a C1-C6 alkyl group; Y is a linking group selected from the group consisting of an aromatic ring, a substituted or unsubstituted linear or branched C1-C20 alkylene group, a C1-C20 alkylene group containing at least one aromatic or heterocyclic ring or having at least one urea or isocyanurate group in the backbone, and a C2-C20 hydrocarbon group containing at least one multiple bond; and R6 is a C1-C6 alkyl group. |