Dynamic magnetic information storage or retrieval – Head – Core
Reexamination Certificate
2007-01-23
2007-01-23
Tupper, Robert S. (Department: 2627)
Dynamic magnetic information storage or retrieval
Head
Core
Reexamination Certificate
active
10619859
ABSTRACT:
A depression is formed on the surface of a lower magnetic pole layer in a thin film magnetic head. A lower auxiliary magnetic pole is defined in the lower magnetic pole layer between the depression and a medium-opposed surface of a head slider. The depression is filled up with a non-magnetic material. When the thin film magnetic head is to be formed, no magnetic layer is formed on the lower magnetic pole layer for forming the lower auxiliary magnetic pole. A dry process such as sputtering and vapor-deposition can be employed to form the lower magnetic pole layer, so that a wider choice can be provided for the material of the lower magnetic pole layer and the lower auxiliary magnetic pole.
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Hasegawa Minoru
Ohtsuka Yoshinori
Greer Burns & Crain Ltd.
Tupper Robert S.
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