Thin-film magnetic head

Details Thin-film magnetic head Thin-film magnetic head

1988-01-05

1990-07-17

Wolff, John H.

Dynamic magnetic information storage or retrieval

Head

Plural gaps

360125, G11B 528

Patent

active

049424890

ABSTRACT:
A thin-film magnetic head which can simultaneously trace two tracks is disclosed. This head comprises: a pair of magnetic gap portions; and a pair of magnetic thin-film layers each of which includes a magnetic pole portion in contact with the magnetic gap portion. A distance between these layers increases as they go away from the magnetic pole portions. Each of the layers includes an expanded portion having a cross sectional area in the passing direction of the magnetic fluxes which is larger than a cross sectional area in the passing direction of the magnetic fluxes at the magnetic pole portion.

REFERENCES:
patent: 3889295 (1975-06-01), Billawala
patent: 4044394 (1977-08-01), Hanazono et al.
patent: 4150408 (1979-04-01), Koel et al.
patent: 4165525 (1979-08-01), Koel et al.
patent: 4255772 (1981-03-01), Perez et al.
patent: 4317149 (1982-02-01), Elser et al.
patent: 4416056 (1983-11-01), Takahashi
patent: 4504880 (1985-03-01), Church et al.

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