Patent ID: 8518275
Filing Date: 2013-08-27
Classification: B81C,B82Y,G03F,H01L,Y10S,Y10T

Abstract:
1. A method of etching a substrate, comprising: applying a material over and in contact with a block copolymer material within a trench in a material layer on a substrate, the material being preferentially wetting to a minority block of the block copolymer material, the trench having a length, a neutral wetting floor, and opposing sidewalls and ends that are preferentially wetting to the minority block of the block copolymer material; annealing the block copolymer material to form one or more lines of half cylinders of the minority block within the trench within a matrix of a majority block of the block copolymer material, the one or more lines of half cylinders extending the length of the trench and oriented parallel to the neutral wetting floor, with a face oriented toward and wetting the neutral wetting floor; removing the preferentially wetting material to expose the annealed block copolymer material within the trench; selectively removing the majority block to expose the substrate wherein at least a portion of the one or more lines of half cylinders remains as a continuous line on the substrate; and etching exposed portions of the substrate to form a trench therein.