Patent ID: 7906031
Filing Date: 2011-03-15
Classification: B81B,B81C,H01L,Y10T

Abstract:
1. A method, comprising: forming a substructure on a substrate using a combination of reactive ion etching and chemical vapor deposition, said substructure comprising a feature having a sidewall and an adjoining bottom surface, said feature comprising a hole, said sidewall comprising a first material, said bottom surface comprising a second material; applying a solution comprising two immiscible polymers to said substructure disposed on said substrate, said two immiscible polymers comprising a first polymer and a second polymer, a selective chemical affinity of said first polymer for said first material being greater than a selective chemical affinity of said second polymer for said first material, a selective chemical affinity of said first polymer for said second material being greater than a selective chemical affinity of said second polymer for said second material, said second polymer comprising poly(α-methyl-(4-hydroxyl benzyl) silsesquioxane-ran-(α-methyl-benzyl silsesquioxane)), said first polymer comprising poly(1,1,1-trifluoro-2-(trifluoromethyl)-2-hydroxy-pent-4-yl methacrylate), said solution further comprising a third polymer miscible with said second polymer, said solution further comprising triphenyl sulfonium nonaflate, a fluorine-containing surfactant, cetyltrimethyl ammonium hydroxide, halfnia nanoparticles, ferrocene, an organosilicate, and a solvent; thermally annealing said applied solution at a temperature above a glass transition temperature of said first polymer and above a glass transition temperature of said second polymer, resulting in segregating said first polymer from said second polymer, said first polymer selectively segregating to said sidewall of said feature, resulting in said first polymer being disposed between said sidewall and said second polymer, said segregating further resulting in a first portion of said first polymer being disposed between said second polymer and said bottom surface, said third material dissolved in said second polymer and automatically aligning with said second polymer; and after said segregating, removing selectively a second portion of said first immiscible polymer, said removing comprising plasma etching, said second immiscible polymer and said first portion of said first polymer remaining on said substrate after said removing, resulting in forming structures on said substrate and resulting in forming a space between said at least one sidewall and said second polymer remaining, said structures comprising said substructure, said second immiscible polymer, said third material dissolved in said second polymer, and said first portion of said first polymer disposed between said second polymer and said bottom surface, said structures having a pattern; and transferring said pattern to said substrate.