Thin film magnetoresistive head

Details Thin film magnetoresistive head Thin film magnetoresistive head

1981-01-28

1983-06-14

Wolff, John H.

Dynamic magnetic information storage or retrieval

Head

Hall effect

338 32R, G11B 512, G11B 530

Patent

active

043886620

ABSTRACT:
A flux-responsive magnetic head having a transducer gap also has first and second back gaps across which, respectively, are first and second thin film magnetoresistive elements. The elements have similarly oriented magnetization vectors and, as such, the magnetoresistive elements are differentially responsive to flux entering said transducer gap. Spurious fields, however, have no differential effect on the resistances of the magnetoresistive elements. In a preferred form of the invention, an additional, similar working, pair of magnetoresistive elements is employed across the back gaps, such additional elements not only providing increased signal response, but also serving as keepers for the first pair of magnetoresistive elements.

REFERENCES:
patent: Re26610 (1969-06-01), DeKoster
patent: 3731007 (1973-05-01), Masuda et al.
patent: 3921218 (1975-11-01), Kayser
patent: 3945038 (1976-03-01), Lazzari
patent: 3947889 (1976-03-01), Lazzari
patent: 4051542 (1977-09-01), Kanai
patent: 4100583 (1978-07-01), Koel et al.
patent: 4306215 (1981-12-01), Jeffers

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