Dynamic magnetic information storage or retrieval – Head – Magnetoresistive reproducing head
Reexamination Certificate
2006-04-25
2006-04-25
Heinz, A. J. (Department: 2653)
Dynamic magnetic information storage or retrieval
Head
Magnetoresistive reproducing head
Reexamination Certificate
active
07035059
ABSTRACT:
A magnetic head having an antiparallel (AP) pinned layer structure having at least two pinned layers with magnetic moments that are self-pinned antiparallel to each other. The pinned layers are separated by an AP coupling layer. A bias layer with a pinned magnetic moment is spaced apart from the AP pinned layer structure. A free layer is positioned between the AP pinned layer structure and the bias layer. At least one of the pinned layers extends beyond track edges of the free layer in a direction parallel to the ABS. Optional antiferromagnetic (AFM) layers can be positioned outside the track edges of the free layer in a direction parallel to the ABS (but not necessarily aligned with the free layer). The AFM layers pin a magnetic orientation of portions of the pinned layer closest thereto that are positioned outside the track edges of the free layer.
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Heinz A. J.
Hitachi Global Storage Technologies Netherland B.V.
Zilka-Kotab, PC
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