Patent ID: 9057951
Filing Date: 2015-06-16
Classification: G03F

Abstract:
1. A photoresist composition comprising: a blend of a phenolic polymer with a (meth)acrylate-based copolymer free of an ether-containing moiety and/or a carboxylic acid-containing moiety, the (meth)acrylate-based copolymer consisting of two monomers: i) a first monomer selected from the group consisting of an alkyl acrylate, a substituted alkyl acrylate, an alkyl (meth)acrylate, a substituted alkyl methacrylate and mixtures thereof, and ii) a second monomer selected from the group consisting of an acrylate, a methacrylate and mixtures thereof, the second monomer having an acid cleavable ester substituent, wherein a coating of the blend exhibits no phase incompatibility between the phenolic polymer and the (meth)acrylate-based copolymer; and a photoacid generator, wherein the phenolic polymer is greater than 50 parts by weight, the (meth)acrylate-based copolymer is less than 50 parts by weight, and the photoacid generator is 0.1 to 20 parts by weight, wherein the (meth)acrylate-based copolymer comprises less than 25% by weight of the photoresist composition based on total weight of the solids.