Method for fabricating a magnetic head

Details Method for fabricating a magnetic head Method for fabricating a magnetic head

2007-01-02

2007-01-02

Kim, Paul D. (Department: 3729)

Metal working

Method of mechanical manufacture

Electrical device making

C029S603130, C029S603140, C029S603150, C029S603180, C216S022000, C216S048000, C360S324100, C360S324110, C360S324120, C360S316000, C427S127000, C427S128000

Reexamination Certificate

active

10676472

ABSTRACT:
A GMR read head for a magnetic head, in which the hard bias layers are fabricated immediately next to the side edges of the free magnetic layer, and such that the midplane of the hard bias layer and the midplane of the free magnetic layer are approximately coplanar. The positioning of the hard bias layer is achieved by depositing a thick hard bias seed layer, followed by an ion milling step is to remove seed layer sidewall deposits. Thereafter, the hard bias layer is deposited on top of the thick seed layer. Alternatively, a first portion of the hard bias seed layer is deposited, followed by an ion milling step to remove sidewall deposits. A thin second portion of the seed layer is next deposited, and the hard bias layer is then deposited.

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“Tunnel-valve and spin-valve structures with in situ in-stack bias”; childress, J.R.; Ho, M.; Fontana, R.E.; Rice, P.M.; Carey, M.J.; Gurney, B.A.; Tsang, C.; Magnetics Conference, 2002. INTERMAG Europe 2002; Apr. 28-May 2, 2002; p. CA8.

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