Patent ID: 8187480

Claim:
A method comprising: depositing a conforming layer on a pre-patterned substrate, the substrate having an array of walls each with a predetermined thickness; etching the conforming layer to a top of the walls and between the walls to form conforming layer walls thinner than and adjacent to the array of walls; removing the array of walls; depositing a diblock copolymer on the substrate between the thinner conforming layer walls; allowing the diblock copolymer to phase separate into a continuous phase and a discrete phase, the discrete phase comprising an array of domains aligned with the thinner conforming layer walls; etching away one phase of the diblock copolymer; etching the pre-patterned substrate using the other one of the phases of the diblock copolymer as a resist pattern; and removing the other one of the phases of the diblock copolymer and the thinner conforming layer walls, wherein the etched pre-patterned substrate forms an imprint stamp for fabricating a magnetic storage device.