Patent ID: 9343664
Filing Date: 2016-05-17
CPC Classification: G11B,G11C,H01F,H01L

Claim Text:
1. A method of patterning a substrate, comprising: forming a protective layer on a magnetically active surface of the substrate; forming a metal nitride film on the protective layer by a PVD process at a temperature less than about 200° C.; forming a patterning film over the metal nitride film; physically imprinting the patterning film to form a pattern; forming a pattern negative layer over the patterning film; removing a portion of the pattern negative layer; removing a portion of the patterning film; patterning the metal nitride film to form protected domains of the magnetically active surface separated by unprotected domains of the magnetically active surface; altering a magnetic property of the unprotected domains of the magnetically active surface by treating the substrate with a plasma; and removing the metal nitride film to form a surface of the substrate having a pattern of magnetic properties.