Dynamic magnetic information storage or retrieval – Head – Core
Reexamination Certificate
2006-08-22
2006-08-22
Klimowicz, William J (Department: 2652)
Dynamic magnetic information storage or retrieval
Head
Core
C360S125330
Reexamination Certificate
active
07095585
ABSTRACT:
An information storage system includes a transducer having a loop of ferromagnetic material with pole tips separated by an nonferromagnetic gap located adjacent to a medium such as a rigid disk. During writing the separation between the pole tips and the media layer of the disk is a small fraction of the gap separation. Due to the small separation between the pole tips and the media layer, the magnetic field generated by the transducer and felt by the media has a larger perpendicular than longitudinal component, favoring perpendicular recording over longitudinal recording. The media may have an easy axis of magnetization oriented substantially along the perpendicular direction, so that perpendicular data storage is energetically favored. The transducer may also include a magnetoresistive sensor for reading magnetic information from the disk.
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Cain William C.
Devillier Michael E.
Hamilton Harold J.
Hempstead Robert D.
Imai Darren T.
Klimowicz William J
Seagate Technology LLC
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