Thin-film magnetic head

Details Thin-film magnetic head Thin-film magnetic head

1988-09-22

1989-08-08

Heinz, A. J.

Dynamic magnetic information storage or retrieval

Head

Core

29603, G11B 5147, H01F 706

Patent

active

048558540

ABSTRACT:
A thin-film, perpendicular magnetic head includes a magnetic recording and reproducing substrate having a mechanochemically polished principal surface that includes a plurality of grooves filled with a nonmagnetic material; a thin-film conducting coil located on the polished surface of the substrate; an insulating layer of inorganic oxide covering the conductor coil and the polished principle surface of the magnetic substrate, this insulating layer including a via hole formed therein and having an exposed surface which is mechanochemically polished; a thin-film main pole on the polished surface of the insulating layer; and a protective overcoat covering the main pole.

REFERENCES:
patent: 4490760 (1984-12-01), Kamimaka
patent: 4651248 (1987-03-01), Shiiki
patent: 4685014 (1987-08-01), Hanazono
patent: 4745506 (1988-05-01), Nakamura

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