Patent ID: 7828986

Claim:
A method for producing surface features, comprising: providing a combination of a block copolymer with additional material, said block copolymer comprising a first block of a first polymer, said first block being covalently bonded to a second block of a second polymer to form a repeating unit of the block copolymer, said first and second polymers being different, said additional material being miscible with said first polymer, said first polymer comprising polystyrene having a molecular weight in a range from about 3.0 kilograms/mole to about 19.0 kilograms/mole, said second polymer comprising poly(ethylene oxide) having a molecular weight in a range from about 4.0 kilograms/mole to about 12.0 kilograms/mole, said additional material comprising a copolymer of methylmethoxysilane and tetraethylorthosilicate; adhering a first layer onto a surface of a substrate, wherein said first layer comprises polydimethylglutarimide, said substrate comprising a dielectric coated silicon wafer; forming a film of said combination directly onto a surface of said first layer, wherein in response to said forming, nanostructures of said additional material self-assemble within said first polymer block, said nanostructures self aligning perpendicular to said surface of said first layer, said film of said combination comprising blocks of said first polymer having at least 7 weight percent silicon and blocks of said second polymer having less than 4 weight percent silicon; and etching by an etchant simultaneously said film of said combination and said first layer, said etchant comprising an argon gas plasma, said nanostructures having an etch rate lower than an etch rate of said block copolymer, said nanostructures having an etch rate lower than an etch rate of said first layer, said nanostructures masking portions of said first layer from said etchant, wherein portions of said film of said combination are removed and features remain on said surface of said first layer after said etching, a ratio of said etch rate of said block copolymer to said etch rate of said nanostructures greater than about 100:1.