Hard bias layer for read heads

Details Hard bias layer for read heads Hard bias layer for read heads

2006-06-20

2006-06-20

Chen, Tianjie (Department: 2656)

Dynamic magnetic information storage or retrieval

Head

Magnetoresistive reproducing head

Reexamination Certificate

active

07064939

ABSTRACT:
A magnetoresistive (MR) read head is disclosed including an MR sensor having a free layer and a pinned layer. A multi-layer hard bias layer stabilizes the free layer of the MR sensor. A product of the moment (Ms) and the thickness (t) of a lower layer of the hard bias layer is greater than a product of the moment (Ms) and the thickness (t) of the free layer of the MR sensor.

REFERENCES:
patent: 6146776 (2000-11-01), Fukuzawa et al.
patent: 6172859 (2001-01-01), Watanabe et al.
patent: 6630248 (2003-10-01), Horng et al.
patent: 6633466 (2003-10-01), Sakaguci et al.

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