High track density dual stripe magnetoresistive (DSMR) head

Details High track density dual stripe magnetoresistive (DSMR) head High track density dual stripe magnetoresistive (DSMR) head

1996-10-07

1997-11-04

Wolff, John H.

Dynamic magnetic information storage or retrieval

Head

Hall effect

G11B 539

Patent

active

056846584

ABSTRACT:
A method for forming a dual stripe magnetoresistive (DSMR) sensor element, and the dual stripe magnetoresistive (DSMR) sensor element formed through the method. To practice the method, there is formed upon a substrate a first magnetoresistive (MR) layer, where the first magnetoresistive (MR) layer has a first sensor region longitudinally magnetically biased in a first longitudinal bias direction through a patterned first longitudinal magnetic biasing layer. There is then formed a second magnetoresistive (MR) layer parallel with and separated from the first magnetoresistive (MR) layer by an insulator layer. The second magnetoresistive (MR) layer has a second sensor region longitudinally magnetically biased in a second longitudinal bias direction through a patterned second longitudinal magnetic biasing layer. The first longitudinal bias direction and the second longitudinal bias direction are substantially parallel. In addition, the first sensor region and the second sensor region are physically offset. Finally, the first magnetoresistive (MR) layer is electromagnetically biased with a first bias current in a first bias current direction and the second magnetoresistive (MR) layer is electromagnetically biased with a second bias current in a second bias current direction, where the first bias current direction and the second bias current direction are substantially parallel.

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Nh Yeh, "Asymmetric Crosstalk of Magnetoresistive Head" IEEE Trans. on Magnetics, vol. 18(6), Nov. 1982, pp. 1155-1157.
L. Nix et al., "Micromagnetic Track Profile Asymmetrics in Dual Magnetoresistive Heads" IEEE Transon Magnetics, vol. 27(6), Nov. 1991 pp. 4693-4697.
J.G. Zhu et al "Recording Limitations for Saumr Dual-Stripe and sph Value Heads" Intermag 1996 Proceedings, Session E8-08, Seattle (1996) no month.

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