Stock material or miscellaneous articles – Magnetic recording component or stock – Magnetic head
Reexamination Certificate
2006-10-10
2006-10-10
Bernatz, Kevin M. (Department: 1773)
Stock material or miscellaneous articles
Magnetic recording component or stock
Magnetic head
C428S815000, C360S324120
Reexamination Certificate
active
07118814
ABSTRACT:
An apparatus and method for step-stabilization of giant magnetoresistive (GMR) based read heads are provided. With the apparatus and method, gratings or periodic structures are generated in the underlayer of the magnetoresistive (MR) sensor stack and the edges, or “steps”, in these structures are the magnetically active features. These “steps” are oriented approximately parallel to the desired bias direction and provide a restoring force towards the bias direction for any perturbations, whether intrinsic or extrinsic. In the case of a GMR sensor, where the easy axis is parallel to the permanent magnet set direction, these stabilizer steps are oriented parallel to the magnetization direction of the permanent magnets.
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Arnold Carl Stephen
Denison Edward Virgil
Helms Carl A.
Nibarger John P.
Bernatz Kevin M.
Storage Technology Corporation
Yee & Associates P.C.
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