Permanet magnet easy-axis biased magnetoresistive head

Details Permanet magnet easy-axis biased magnetoresistive head Permanet magnet easy-axis biased magnetoresistive head

1991-04-17

1993-03-09

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Head

Hall effect

G11B 539

Patent

active

051930390

ABSTRACT:
Method and apparatus for supplying bias to a magnetoresistive element in an encapsulated thin film head for reducing the likelihood of generation of Barkhausen noise when reading flux from a magnetic storage disk. The invention achieves a relatively uniform easy axis bias field in an easy to implement manner by creating a magnetic bias structure on the encapsulated heat at the same time as providing the contact pads for the MR element.

REFERENCES:
patent: 4663684 (1987-05-01), Kamo et al.
patent: 4713708 (1987-12-01), Krounbi et al.
patent: 4733455 (1988-03-01), Nakamura et al.
patent: 4903158 (1990-02-01), Smith
patent: 4972284 (1990-11-01), Smith et al.
Markham et al., Magnetoresistive Head Technology, Proceedings of the Symp. on Magnetic Materials, Process & Devices, EM Soc., vol. 90-8 (1990).
Smith et al., An Improved Thin Film Permanent Magnetic Material and Novel Magnet Design for Magnetoresistive Sensor Biasing, IEEE Trans. on Magnetics, vol. 26, No. 5, Sep. 1990, pp. 2409-2411.
Uchida et al., A Non-Shielded Mr Head with Improved Resolution, IEEE Trans. On Magnetics, vol. MAG-18, No. 6, Nov. 1982, pp. 1152-1154.

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