Shielded pole magnetic head for perpendicular recording

Details Shielded pole magnetic head for perpendicular recording Shielded pole magnetic head for perpendicular recording

2007-03-20

2007-03-20

Tupper, Robert S. (Department: 2627)

Dynamic magnetic information storage or retrieval

Head

Core

Reexamination Certificate

active

10819533

ABSTRACT:
A read/write head for use in a perpendicular magnetic recording head in a data storage system. The read/write head includes a write section that is comprised of a first pole layer, a second pole layer, a third pole layer, and a shield layer. The third pole layer defines a write pole tip, and the third pole layer and the shield layer are separated from each other to define a write gap therebetween. At least part of the shield layer has a generally uniform width, and wherein the write pole tip defines a track width that is substantially equal to the uniform width of the shield layer. According to one embodiment the entire shield layer has a generally uniform width that is substantially equal to the track width. According to another embodiment, the shield layer includes a lower section and an upper section, wherein the lower section has a generally uniform width along its entire length, and wherein the upper section is wider than the lower section.

REFERENCES:
patent: 6954340 (2005-10-01), Shukh et al.
patent: 7002775 (2006-02-01), Hsu et al.
patent: 7054106 (2006-05-01), Kudo et al.
patent: 7088548 (2006-08-01), Nishida et al.
patent: 7119988 (2006-10-01), Lille

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