Magnetoresistive read transducer having hard magnetic bias

Details Magnetoresistive read transducer having hard magnetic bias Magnetoresistive read transducer having hard magnetic bias

1989-10-10

1991-05-21

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Head

Hall effect

G11B 539

Patent

active

050180371

ABSTRACT:
A magnetoresistive (MR) read transducer having passive end regions separated by a central active region in which an MR layer is formed which extends over substantially only the central active region and in which a hard magnetic layer is formed in each end region. The hard magnetic layers form an abutting junction having electrical and magnetic continuity with the MR layer to produce a longitudinal bias in the MR sensor. The transducer is produced by a method in which the same stencil defines the extent of both the MR layer and the hard magnetic layers so that the abutting junctions are formed easily and reliably.

REFERENCES:
patent: 3840898 (1974-10-01), Bajorek et al.
patent: 4024489 (1977-05-01), Bajorek et al.
patent: 4639806 (1987-01-01), Kira et al.
patent: 4663685 (1987-05-01), Tsang
patent: 4771349 (1988-09-01), Tsang
patent: 4782414 (1988-11-01), Krounbi et al.
patent: 4803580 (1989-02-01), Mowry

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