Magnetic bias pinning layer for GMR sensor of a magnetic...

Details Magnetic bias pinning layer for GMR sensor of a magnetic... Magnetic bias pinning layer for GMR sensor of a magnetic...

2005-12-27

2005-12-27

Watko, Julie Anne (Department: 2653)

Dynamic magnetic information storage or retrieval

Head

Magnetoresistive reproducing head

Reexamination Certificate

active

06980406

ABSTRACT:
A giant magneto-resistive (GMR) sensor for a magnetic head for a hard disk drive is disclosed. The sensor includes: a free magnetic layer; a bias layer that provides a bias magnetic field to the free magnetic layer and a bias pinning layer that provides a stabilizing magnetic field to the bias layer and that has a width substantially longer than the width of the free magnetic layer. Embodiments of the invention may further include an anti-ferromagnetic layer having a width substantially longer than the width of the free layer, or both an anti-ferromagnetic layer and a pinned magnetic structure each having a width substantially longer than the width of the free layer.

REFERENCES:
patent: 6671139 (2003-12-01), Carey et al.
patent: 2003/0137781 (2003-07-01), Carey et al.
patent: 2003/0179514 (2003-09-01), Pinarbasi

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