Method of making a merged magnetic read head and write head

Details Method of making a merged magnetic read head and write head Method of making a merged magnetic read head and write head

2006-04-04

2006-04-04

Tugbang, A. Dexter (Department: 3729)

Metal working

Method of mechanical manufacture

Electrical device making

C029S603070, C029S603130, C029S603150, C029S603270, C360S324000, C360S325000, C360S326000, C360S327000, C427S127000, C427S128000

Reexamination Certificate

active

07020951

ABSTRACT:
An antiferromagnetic stabilization scheme is employed in a magnetic head for magnetically stabilizing a free layer of a spin valve. This is accomplished by utilizing an antiferromagnetic oxide film below a spin valve sensor in a read region and first and second lead layers in end regions and a ferromagnetic film in each of the lead layers that exchange couples to the antiferromagnetic oxide film in the end regions. The ferromagnetic films are pinned with their magnetic moments oriented parallel to an air bearing surface (ABS) of the magnetic head. The ferromagnetic film magnetostatically couples to the free layer which causes the free layer to be in a single magnetic domain state. Accordingly, when the free layer is subjected to magnetic incursions from a rotating disk in a disk drive, the free layer maintains a stable magnetic condition so that resistance changes of the free layer are not altered by differing magnetic conditions of the free layer.

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“Track-edge read-write effect of inductive/MR dual element heads”; Yuan, S.W.; Thayamballi, P.; Hua-Ching Tong; Magnetics, IEEE Transactions on vol. 32, Issue 5, Sep. 1996; Page(s):3461-3463.

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