Combination read/write thin film magnetic head using a shielding

Details Combination read/write thin film magnetic head using a shielding Combination read/write thin film magnetic head using a shielding

1997-11-17

1999-09-28

Wolff, John H.

Dynamic magnetic information storage or retrieval

Head

Core

G11B 5147

Patent

active

059598131

ABSTRACT:
The present invention provides a combination read/write thin film magnetic head wherein the width of a gap layer is the same as the track width Tw, and a shielding magnetic layer of a soft magnetic material is formed on both sides of the gap layer so that blots of a record magnetic field out of the track width Tw can be absorbed by the shielding magnetic layer, and write fringing can be prevented. Particularly, when the saturation magnetic flux density and thickness of the shielding magnetic layer are appropriately adjusted, it is possible to suppress write fringing, and at the same time maintain reproduced output at a high level.

REFERENCES:
patent: 5032945 (1991-07-01), Argyle et al.
patent: 5331728 (1994-07-01), Argyle et al.
patent: 5388019 (1995-02-01), Argyle et al.
patent: 5621595 (1997-04-01), Cohen
patent: 5639509 (1997-06-01), Schemmel
patent: 5751522 (1998-05-01), Yamada et al.
patent: 5751526 (1998-05-01), Schemmel
patent: 5759681 (1998-06-01), Hosoe et al.

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