Magnetoresistive effect composite head

Details Magnetoresistive effect composite head Magnetoresistive effect composite head

1998-04-06

2000-11-28

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Head

Magnetoresistive reproducing head

G11B 539

Patent

active

061543454

ABSTRACT:
An ID head is formed after a MR head is formed. An upper shield far from a substrate is a first magnetic pole. A nonmagnetic insulator existing through a magnetic gap on the first magnetic pole determines zero throat height, thereby specifying a recording track width of less than 2 .mu.m. The ID head comprises a front end portion of a second magnetic pole, which is exposed to ABS and partly rides over the nonmagnetic insulator, a nonmagnetic insulator for burying a step by the front end portion, a coil which is formed on the nonmagnetic insulator and covered with a nonmagnetic insulator, and a main body portion of the second magnetic pole formed so as to ride over the coil and front end portion. As a result, it is possible to solved various problems of the ID head in which the front end portion of the second magnetic pole is formed first to realize a narrow track width.

REFERENCES:
patent: 5438747 (1995-08-01), Kroumbi et al.
patent: 5652687 (1997-07-01), Chen et al.
patent: 5805391 (1998-09-01), Chang et al.
Robert P. Hunt, "A Magnetoresistive Readout Transducer", IEEE Transactions on Magnetics, vol. Mag-7, No. 1, Mar. 1971, pp. 150-154.
Chang Tsang et al., "Design, Fabrication & Testing of Spin-Valve Read Heads for High Density Recording", IEEE Transactions on Magnetics, vol. 30, No. 6, Nov. 1994, pp. 3801-3806.

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