Dynamic magnetic information storage or retrieval – Head – Core
Reexamination Certificate
2006-09-12
2006-09-12
Evans, Jefferson (Department: 2627)
Dynamic magnetic information storage or retrieval
Head
Core
C360S119050
Reexamination Certificate
active
07106554
ABSTRACT:
Conventional perpendicular writers that utilize an extended return pole are subject to large undershoot fields. This problem has been reduced by replacing the prior art extended return pole by one whose magnetic potential has been increased relative to both the main and return poles. In a first embodiment, a second non-magnetic gap is inserted between the extended return pole and the return pole. In a second embodiment, the extended return pole is made very thin, thereby increasing its reluctance, while a third embodiment combines both reluctance-increasing features in a single design.
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Guan Lijie
Hu Hung Liang
Ju Kochan
Tang Yaw Shing
Evans Jefferson
Headway Technologies Inc.
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