Thin film magnetic head

Details Thin film magnetic head Thin film magnetic head

1991-08-21

1992-05-12

Wolff, John H.

Dynamic magnetic information storage or retrieval

Head

Core

360123, G11B 5147

Patent

active

051133008

ABSTRACT:
A thin film magnetic head which includes a substrate of magnetic or nonmagnetic material, an upper magnetic film on the substrate, a coil conductor on the substrate, and a lower magnetic film on the substrate, the lower magnetic film having a groove formed therein for receiving the coil conductor therein. In the preferred form of the present invention, the thickness of the lower magnetic film is at least 0.3 times the thickness of the upper magnetic film when the substrate is composed of a magnetic material and at least 0.8 times the thickness of the upper magnetic film when the substrate is composed of a nonmagnetic material.

REFERENCES:
patent: 4190872 (1980-02-01), Jones, Jr. et al.
patent: 4281357 (1981-07-01), Lee
patent: 4375657 (1983-03-01), Brock et al.
patent: 4402801 (1983-09-01), Omata et al.
patent: 4490760 (1984-12-01), Kaminaka et al.
patent: 4636901 (1987-01-01), Ohura et al.
patent: 4639289 (1987-01-01), Lazzari
patent: 4652957 (1987-03-01), Schewe et al.
Japanese 60113312, Jun. 1985, Handa.
The Patent Abstract of Japan vol. 8, No. 183 (P-296) (1620) Aug. 23, 1984, 59-75421 Saitou et al.

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