Methods and apparatus for improved read sensors of the CPP...

Details Methods and apparatus for improved read sensors of the CPP... Methods and apparatus for improved read sensors of the CPP...

2007-04-05

2008-10-21

Castro, Angel (Department: 2627)

Dynamic magnetic information storage or retrieval

Head

Magnetoresistive reproducing head

Reexamination Certificate

active

07440242

ABSTRACT:
A magnetic head with improved hard magnet properties includes a sensor stack structure of current-perpendicular-to-the-planes (CPP) type formed in a central region between first and second shield layers, and a multi-layered seed layer structure formed in side regions adjacent the central region. The multi-layered structure has a first layer including nitrogenated nickel-tantalum (NiTa+N) and a second layer including chromium-molybdenum (CrMo), which are formed over an insulator in the side regions. A hard bias layer formed over the multi-layered structure is preferably a cobalt-based alloy. Methods of making the magnetic head are also described.

REFERENCES:
patent: 7177121 (2007-02-01), Kojima et al.
patent: 7259941 (2007-08-01), Pinarbasi
patent: 2006/0002041 (2006-01-01), Pinarbasi
patent: 2007/0091515 (2007-04-01), Freitag et al.

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