Thin-film magnetic head

Details Thin-film magnetic head Thin-film magnetic head

1986-01-28

1988-05-10

Heinz, A. J.

Dynamic magnetic information storage or retrieval

Head

Core

G11B 5147

Patent

active

047439882

ABSTRACT:
A thin-film magnetic head is disclosed wherein a first core portion includes an insulative island of inorganic material. A first coil section is formed in the island so that it presents a flat common surface with the island and substrate. A gap-forming insulating layer is on the first coil section and the first core portion. A second core portion is on the gap-forming layer, forming a magnetic circuit with the first core portion. A second coil section is connected to the first coil section to form a coil therewith. In a modification, the head comprises a nonmagnetic substrate in which a coil section is formed to present a flat common surface. Metallic ferromagnetic material is used to form core portions on the coil section.

REFERENCES:
patent: 4191983 (1980-03-01), Gibson
patent: 4239587 (1980-12-01), Koel et al.
patent: 4458279 (1984-07-01), Katz
patent: 4516180 (1985-05-01), Narishige
patent: 4558385 (1985-12-01), Kaminaka

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