Method and apparatus for providing a dual...

Details Method and apparatus for providing a dual... Method and apparatus for providing a dual...

2007-04-10

2007-04-10

Evans, Jefferson (Department: 2627)

Dynamic magnetic information storage or retrieval

Head

Magnetoresistive reproducing head

C360S324110

Reexamination Certificate

active

10811525

ABSTRACT:
A method and apparatus for providing a dual current-perpendicular-to-plane (CPP) GMR sensor with improved top pinning is disclosed. In the passive regions of the sensor, a tri-level biasing layer is formed proximate to the top self-pinned layer. The tri-level biasing layer includes a first metal oxide layer, a layer of alpha-Fe2O3and a second metal oxide layer. The pinning of the top self-pinned layer is enhanced by the layer of alpha-Fe2O3. The layer of alpha-Fe2O3pins the top portion of the pinned layer by providing higher coercivity (HC) to the pinned layer.

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patent: 2003/0086217 (2003-05-01), Pinarbasi

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