Magnetic head having a bilayer pole tip

Details Magnetic head having a bilayer pole tip Magnetic head having a bilayer pole tip

2006-08-01

2006-08-01

Chen, Tianjie (Department: 2656)

Dynamic magnetic information storage or retrieval

Head

Core

Reexamination Certificate

active

07085100

ABSTRACT:
A magnetic head having improved overwrite capabilities and reduced fringing fields are described along with methods of making the same. The magnetic head has a first pole piece and a second pole piece. The first pole piece includes a first bottom pole piece layer, a pedestal portion formed over the first bottom pole piece layer, and a notched top pole portion formed over the pedestal portion. A gap layer separates the second pole piece from the notched top pole portion. The pedestal portion has a first saturation magnetization MS1and the top pole portion has a second saturation magnetization MS2that is greater than the first saturation magnetization MS1. The top pole portion has a substantially planar top surface over which a portion of the gap layer and the second pole piece are formed.

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