Patent ID: 7509729
Filing Date: 2009-03-31
Classification: G11B,Y10T

Abstract:
1. A method for making a perpendicular magnetic recording write head having a write pole, a trailing shield, and a gap layer between the write pole and the trailing shield, the method comprising: depositing on a substrate a layer of magnetic write pole material having the desired thickness for the write pole; depositing a layer of gap material on the write pole layer; depositing a primary resist layer on the gap layer; depositing a metal mask layer on the resist layer; depositing an anti-reflection coating on the metal mask layer; forming an imaging resist pattern on the anti-reflection coating, the imaging resist pattern generally defining the desired shape of the write pole; ion milling over the imaging resist pattern to remove the anti-reflection coating in regions not covered by the imaging resist pattern; ion milling without a reactive gas over the imaging resist pattern to pattern the metal mask layer, removing the metal mask layer in regions not covered by the imaging resist pattern and exposing the underlying primary resist layer; ion milling over the metal mask pattern to pattern the primary resist layer, removing the primary resist layer in regions not covered by the metal mask pattern; and ion milling without a reactive gas over the primary resist pattern to pattern the underlying gap layer and write pole material.