Patent ID: 7788797
Filing Date: 2010-09-07
Classification: G11B,Y10T

Abstract:
1. A method using reactive ion beam etching (RIBE) in CHF 3 for making a perpendicular magnetic recording write head having a write pole and a notched trailing shield comprising: depositing on a substrate a layer of magnetic write pole material having the desired thickness for the write pole; depositing a thin nonmagnetic mask film on the write pole layer; depositing a nonmagnetic metal protective film directly on the mask film; forming a patterned resist layer on the metal protective film; etching the metal protective film, underlying mask film and the write pole layer substantially to the substrate to leave the write pole with mask film and metal protective film in regions covered by the patterned resist layer; covering the patterned resist layer and underlying metal protective film, mask film and write pole with nonmagnetic filler material substantially more reactive to CHF removing a portion of the filler material leaving filler material to a thickness greater than the write pole thickness; removing the resist layer to leave an opening in the remaining filler material exposing the metal protective film and underlying mask film and write pole; after removal of the resist layer from the metal protective film, removing the filler material at the edges of the metal protective film, without removing the metal protective film, so as to widen said opening by exposing the filler material and the metal protective film to RIBE in CHF depositing a nonmagnetic metal gap layer directly on the metal protective film in said widened opening and directly on the remaining filler material at said widened opening; and depositing over said gap layer a layer of magnetic trailing shield material, the portion of said trailing shield material within said widened opening forming a generally trapezoidal shaped trailing shield notch spaced from the underlying write pole by the gap layer, the metal protective film and the mask film, and the portion of said trailing shield material over the remaining filler material at said widened opening being spaced form the remaining filler material only by the gap layer.