Patent ID: 7816069

Claim:
A composition for formation of a spin-on antireflective coating layer, comprising: (a) a plurality of polymer components, wherein said polymer components are homopolymers or copolymers selected from the group consisting of poly(vinyl butyral-co-vinyl alcohol-co-vinyl acetate), poly(isobornyl methacrylate-co-glycidyl methacrylate), poly(pentafluorostyrene-co-glycidyl methacrylate-co-methyl methacrylate), poly(styrene-co-methacrylic acid-co-methyl methacrylate), poly(pentafluorostyrene-co-glycidyl methacrylate), poly(ethenyl hexafluoroisopropyl cyclopentane-co-ethenyl hydroxyethyl cyclopentane, poly(ethenyl hexafluoroisopropyl cyclopentane-co-ethenyl hydroxymethyl cyclopentane), poly(ethenyl cyclopentane methyl ester-co-ethenyl hydroxyethyl cyclopentane), poly(styrene-co-hydroxyethyl methacrylate-co-methyl methacrylate), poly(hydroxystyrene, brominated), poly(o-cresyl glycidyl ether-co-formaldehyde), poly(4-bromostyrene-co-glycidyl methacrylate, poly(4-bromostyrene-co-hydroxyethylmethacrylate), and poly(hydroxystyrene), wherein the plurality of polymer components comprises a first polymer component that has at least one chromophore moiety at an imaging radiation wavelength, and a second polymer component has at least one transparent moiety at the imaging radiation wavelength, (b) a separate crosslinking component, and (c) an acid generator, wherein the first polymer component has a first segregation preference towards a first interface of the composition and the second polymer component has a second segregation preference towards a second interface of the composition during at least one of a film casting and a film baking process, and wherein the polymer components have a molecular weight ranging from about 1000 to about 500,000.