Dynamic magnetic information storage or retrieval – Head – Core
Reexamination Certificate
2005-11-15
2005-11-15
Heinz, A. J. (Department: 2653)
Dynamic magnetic information storage or retrieval
Head
Core
Reexamination Certificate
active
06965494
ABSTRACT:
A magnetic recording head includes a first pole having multiple magnetic layers separated by multiple gap layers. The multiple magnetic layers make up a write pole which produces a first hard axis field and a first auxiliary pole that produces a first auxiliary field that opposes the first hard axis field resulting in a reduced net hard axis field. The write pole and the first auxiliary pole are separated by a first gap layer made of a material that is less magnetically conducting than the write pole and the first auxiliary pole. The write pole is located upstream from the first auxiliary pole relative to a perpendicular magnetic recording medium. A portion of the first auxiliary pole exists in a region between a surface of the perpendicular magnetic recording medium and five microns from a surface of the perpendicular magnetic recording medium.
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Campbell Robert Owen
Seshan Chitra
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