Sensor with in-stack bias structure providing enhanced...

Details Sensor with in-stack bias structure providing enhanced... Sensor with in-stack bias structure providing enhanced...

2008-07-08

2008-07-08

Davis, David D (Department: 2627)

Dynamic magnetic information storage or retrieval

Head

Magnetoresistive reproducing head

Reexamination Certificate

active

07397637

ABSTRACT:
A magnetic head having an in-stack bias structure and a free layer structure. The in-stack bias structure includes an antiferromagnetic layer, and first through fourth antiparallel (AP) pinned bias layers separated by three AP coupling layers. A first spacer layer is positioned above the fourth bias layer of the bias structure. A free layer is positioned above the first spacer layer. The fourth bias layer magnetostatically stabilizes the free layer.

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