Patent ID: 7964684

Claim:
An antireflection film forming composition, comprising: a polymerized product of Compound (I) having m number of RSi(O 0.5 ) 3 units, in which m stands for an integer of from 8 to 16, and Rs each independently represents a non-hydrolyzable group, with the proviso that at least two of Rs each represents a vinyl- or ethynyl-containing group, wherein each of the RSi(O 0.5 ) 3 units is linked to another RSi(O 0.5 ) 3 unit while having an oxygen atom in common and constitutes a cage structure; and a photopolymerization initiator selected from the group consisting of, acetophenonebenzylketal, anthraquinone, 1-(4-isopropylphenyl)-2-hydroxy-2-methylpropan-1 -one, carbazole, xanthone, 4-chlorobenzophenone, 4,4′-diaminobenzophenone, 1,1-dimethoxydeoxybenzoin, 3,3′-dimethyl-4-methoxybenzophenone, thioxanthone, 2,2-dimethoxy-2-phenylacetophenone, 1-(4-dodecylphenyl)-2-hydroxy-2-methylpropan- 1-one, 2-methyl-1-[4-(methylthio) phenyl]-2-morpholinopropan-1-one, triphenylamine, 2,4,6-trimethylbenzoyldiphenylphosphine oxide, 1-hydroxycyclohexylphenylketone, 2-hydroxy-2-methyl-1-phenylpropan-1-one, fluorenone, fluorene, benzaldehyde, benzoinethylether, benzoinpropylether, benzophenone, Michler's ketone, 3-methylacetophenone, 3,3′,4,4′-tetra(tert-butylperoxycarbonyl) benzophenone, 2-(dimethylamino)-[1-[4-(morpholinyl)phenyl]-2-phenylmethyl]-1butanone, 4-benzoyl-4′-methyldiphenylsulfide, and a combination of 3,3′,4,4′-tetra(tert-butylperoxycarbonyl)benzophenone with a pigment sensitizer, and wherein, of solids contained in the composition, the polymerized product obtained by a polymerization reaction of Compound (I) amounts to 60 mass % or greater and Compound (I) amounts to 15 mass % or less, and further wherein, in the solids component of the composition, from 10 to 90 mol % of the vinyl or ethynyl groups of Compound (I) remain unreacted.