Dynamic magnetic information storage or retrieval – Head – Core
Reexamination Certificate
2006-12-05
2006-12-05
Miller, Brian E. (Department: 2627)
Dynamic magnetic information storage or retrieval
Head
Core
Reexamination Certificate
active
07145750
ABSTRACT:
There is provided a perpendicular magnetic recording and reproducing system in which the overwrite erase ratio of a perpendicular magnetic head has been improved to prevent the deterioration of an overwrite property. In the perpendicular magnetic head, a third magnetic pole composed of a soft magnetic layer is formed on the leading side of a recording magnetic pole via a non-magnetic layer, thereby reducing magnetic interference from magnetization on a medium with the recording magnetic pole and preventing the deterioration of the overwrite property.
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Kawato Yoshiaki
Kimura Hisashi
Nakamoto Kazuhiro
Yoshida Nobuo
A. Marquez, Esq. Juan Carlos
Fisher Esq. Stanley P.
Hitachi Global Storage Technologies Japan Ltd.
Miller Brian E.
Reed Smith LLP
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