Method of making a read head having a tunnel junction sensor...

Details Method of making a read head having a tunnel junction sensor... Method of making a read head having a tunnel junction sensor...

2006-05-30

2006-05-30

Klimowicz, William J (Department: 2652)

Dynamic magnetic information storage or retrieval

Head

Magnetoresistive reproducing head

C029S603140

Reexamination Certificate

active

07054117

ABSTRACT:
Longitudinal biasing of a free layer in a current perpendicular to the planes of the layers (CPP) type of sensor in a read head is implemented by pinning magnetic moments of first and second side portions of the free layer beyond the track width of the read head with first and second insulating antiferromagnetic (AFM) layers which are exchange coupled thereto. The pinning of the magnetic moments of the first and second side portions of the free layer pin and longitudinally bias the central active portion of the free layer within the track width so that the central portion of the free layer is magnetically stable.

REFERENCES:
patent: 6636396 (2003-10-01), Gill
patent: 6704176 (2004-03-01), Shukh et al.
patent: 6751845 (2004-06-01), Gill
patent: 6754056 (2004-06-01), Ho et al.
patent: 6833982 (2004-12-01), Jayasekara
patent: 6865062 (2005-03-01), Pinarbasi
patent: 2001/0005300 (2001-06-01), Hayashi

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