Magnetic recording disk drive with data written and read as...

Details Magnetic recording disk drive with data written and read as... Magnetic recording disk drive with data written and read as...

2006-07-18

2006-07-18

Sniezek, Andrew L. (Department: 2627)

Dynamic magnetic information storage or retrieval

General recording or reproducing

C360S048000, C360S125020, C360S319000

Reexamination Certificate

active

07079344

ABSTRACT:
A magnetic recording disk drive has a disk with the magnetizations in the concentric data tracks oriented in the cross-track direction. The concentric data tracks are magnetically separated from each other by guard bands. An inductive write head has its write poles and write gap oriented to generate magnetic fields in the cross-track direction. The guard bands may provide magnetic separation by containing along-the-track magnetizations, in which case the write head also has an erase pole and an erase gap to generate magnetic fields in an along-the-track direction on the sides of the data tracks. A magnetoresistive read head has its free-layer magnetization direction perpendicular to the disk surface and its pinned-layer magnetization direction parallel to the disk surface and orthogonal to the free-layer magnetization direction. The read head may have magnetic side shields spaced from it in the cross-track direction to prevent magnetic flux from adjacent data tracks from reaching the read head.

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