Method of making a magnetoresistive device having improved Barkh

Details Method of making a magnetoresistive device having improved Barkh Method of making a magnetoresistive device having improved Barkh

1995-02-22

1997-06-03

Echols, P. W.

Metal working

Method of mechanical manufacture

Electrical device making

2960315, G11B 542

Patent

active

056342608

ABSTRACT:
An improved magnetoresistive device and method for fabricating the same which results in improved Barkhausen noise suppression. A generally coplanar device is described having an MR structure conductive region longitudinally biased by opposing permanent magnet layers separated therefrom by a non-magnetic metal or dielectric separation layer. Significant reduction of the demagnetization energy near the MR-to-permanent magnet junction is achieved, particularly in the use of an elliptically shaped conductive region and the resultant generally coplanar device is readily fabricated and reproducible using a self-aligning process. The longitudinal bias technique described can be used in conjunction with all known transverse bias techniques.

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Composite Films as a Domain-Wall Barrier--R.P. Hunt and A.A. Jaecklin Journal of Applied Physics, vol. 37, No. 3, 1 Mar. 66.

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