Thin-film magnetic head comprising a magneto-resistive...

Details Thin-film magnetic head comprising a magneto-resistive... Thin-film magnetic head comprising a magneto-resistive...

2011-03-22

2011-03-22

Evans, Jefferson (Department: 2627)

Dynamic magnetic information storage or retrieval

Head

Magnetoresistive reproducing head

Reexamination Certificate

active

07911745

ABSTRACT:
A thin-film magnetic head includes a magneto-resistive effect device of the CPP structure including a multilayer film comprising a stack of a fixed magnetization layer, a nonmagnetic layer and a free layer stacked one upon another in order, with a sense current applied in the stacking direction of the multilayer film, and an upper shield layer and a lower shield layer with the magneto-resistive effect device held between them in the thickness direction, and further comprises a bias magnetic field-applying layer located at each end of the multilayer film in the widthwise direction and a re-magnetizer unit designed such that when the bias magnetic field-applying layers malfunction, they are re-magnetized to go back to normal.

REFERENCES:
patent: 6157524 (2000-12-01), Nakazawa et al.
patent: 7370404 (2008-05-01), Gill et al.
patent: 7672091 (2010-03-01), Xue et al.
patent: 2008/0043380 (2008-02-01), Akie
patent: 2002-109708 (2002-04-01), None
patent: 2003-92439 (2003-03-01), None
patent: 2005-78666 (2005-03-01), None

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