Dynamic magnetic information storage or retrieval – Head – Core
Reexamination Certificate
2007-11-19
2011-12-13
Heinz, A. J. (Department: 2627)
Dynamic magnetic information storage or retrieval
Head
Core
C360S125080
Reexamination Certificate
active
08077434
ABSTRACT:
A method and system for providing a magnetic transducer having an air-bearing surface (ABS) are described. The magnetic transducer includes a base layer, a perpendicular magnetic recording (PMR) pole on the base layer, an additional pole, a write shield, a write gap between the PMR pole and a portion of the write shield, and coil(s) that energize at least the additional pole. The base layer includes a first portion proximate to the ABS and a second portion recessed from the ABS. The first portion is nonmagnetic, while the second portion is magnetic. The PMR pole has a first front portion proximate to the ABS. The additional pole has a second front portion recessed from the ABS. At least a portion of the additional pole resides between the PMR pole and write shield. At least a portion of the write gap resides on the front portion of the PMR pole.
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Chen Yingjian
Shen Yong
Tran Ut
Zhang Lei Larry
Heinz A. J.
Western Digital (Fremont) , LLC
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