Patent ID: 8404124

Claim:
A method for fabricating nanoscale microstructures, comprising: forming a film comprising a cylindrical-phase block copolymer within a plurality of trenches to a thickness of about L o , each trench having a width, length, sidewalls, ends and a floor, wherein the sidewalls and ends of the trenches are preferential wetting to a first block of the block copolymer, the floor of at least one trench is preferential wetting to the first block and the floor of another trench is neutral wetting to a second block of the block copolymer; and causing the block copolymer film to self-assemble to form perpendicularly-oriented cylindrical domains of the minority block of the block copolymer in a matrix of a majority block within trenches having said neutral wetting floor, and parallel-oriented half-cylindrical domains of the minority block in a matrix of the majority block within trenches having the preferential wetting floor.