Method of fabricating a layered magnetic head

Details Method of fabricating a layered magnetic head Method of fabricating a layered magnetic head

1996-10-09

1998-09-22

Pianalto, Bernard

Coating processes

Magnetic base or coating

Magnetic coating

427132, 428694R, 428695, 428900, B05D 512

Patent

active

058111557

ABSTRACT:
In a magnetoresistive read transducer, a material which is inert with respect to the soft film magnetic biasing layer is formed at the surface of the substrate prior to soft film deposition. In a preferred embodiment of the present invention, a substrate surface layer of metal such as Cr or Ta is used. These metals have high resistivity due to partial oxidation when deposited on the substrate to reduce shunting of sensing current through the magnetoresistive layer, and further acts as a barrier to protect the soft film from substrate interface contamination. The surface layer also acts as a seed layer to set the soft film magnetization orientation in a well-defined direction therefore reducing magnetic instability.

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patent: 5374450 (1994-12-01), Sato et al.
patent: 5456978 (1995-10-01), Lal et al.

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