Patent ID: 7867689
Filing Date: 2011-01-11
Classification: G03F,H01L,Y10S

Abstract:
1. A method of forming a relief pattern on a substrate, comprising: forming a film of a composition on the substrate said composition comprising a polymer blend comprising a first polymer and a second polymer, wherein said first polymer is described by the general formula: wherein m and n are integers in a range from 1 to about 5000, wherein R 2 is wherein R 1 is wherein said second polymer is a polysilsesquioxane having silanol end groups and a weight averaged molecular weight between about 1500 grams/mole and about 10,000 grams/mole, said second polymer described by the general formula: wherein x is an integer between about 4 and about 50,000, and wherein R 3 is wherein said second polymer is configured to undergo chemical crosslinking with said first polymer, said second polymer, or a combination thereof upon sufficient exposure to light, thermal energy, or a combination thereof, said composition further comprising a photosensitive acid generator comprising N-(trifluoromethylsulfonyloxy)-bicyclo[2.2.1]hept-5-ene-2,3-dicarboximide, said composition further comprising an organic base comprising 1,8-diaminonaphthalene, said composition further comprising an organic crosslinking agent comprising 2,6-bis(hydroxymethyl)-p-cresol, said substrate comprising a silicon wafer; patternwise imaging said film through a mask, wherein at least one region of said film is exposed to radiation having a wavelength of about 248 nanometers, resulting in production of an acid catalyst in said at least one exposed region of said film; after said imaging, baking said film at a temperature between about 50° C. and about 200° C., resulting in inducing crosslinking in said at least one exposed region of said film, wherein said crosslinking renders said exposed region insoluble in aqueous base; after said baking, developing said film in an aqueous base solution, resulting in removal of base-soluble unexposed regions of said film, wherein a relief pattern from said film remains following said removal; and curing said relief pattern at a temperature between about 300° C. and about 450° C., said curing comprising utilizing a combination of thermal treatment with UV radiation.