Patent ID: 8785559
Filing Date: 2014-07-22
Classification: B32B,B81C,B82Y,C08G,G03F,Y10T

Abstract:
1. A method of forming a self-assembled block copolymer structure, comprising: preparing an azido-functionalized random poly(styrene-r-ethylene oxide) graft copolymer by: forming the azido-functionalized random poly(styrene-r-ethylene oxide) graft copolymer over at least a portion of a floor of a trench in a substrate to provide a trench having at least one portion of the floor bearing azido-functionalized random poly(styrene-r-ethylene oxide) graft copolymer and at least one portion of the floor exposing the substrate; forming a block copolymer material within the trench in the substrate; and annealing the block copolymer material to self-assemble the block copolymer material into first and second self-assembled domains of a first polymer block of the block copolymer material in a matrix of a second polymer block, the first self-assembled domains over the at least a portion of the floor of the trench bearing a crosslinked material of the azido-functionalized random poly(styrene-r-ethylene oxide) graft copolymer, the first self-assembled domains oriented perpendicular to the at least a portion of the floor of the trench bearing the crosslinked material of the azido-functionalized random poly(styrene-r-ethylene oxide) graft copolymer and parallel to sidewalk of the trench, the second self-assembled domains over the at least a portion of the floor of the trench exposing the substrate, the second self-assembled domains oriented parallel to the floor and sidewalls of the trench.