Dynamic magnetic information storage or retrieval – Head – Core
Patent
1991-06-11
1993-06-08
Levy, Stuart S.
Dynamic magnetic information storage or retrieval
Head
Core
360125, 360122, G11B 5147, G11B 531, G11B 5255
Patent
active
052184994
ABSTRACT:
A thin film magnetic head for perpendicular magnetic recording includes a magnetic member lying on a wear-resistant substrate of a non-magnetic material and defining a return path for magnetic flux. The magnetic member has a main groove formed in one of its principal surfaces in parallel to a sliding surface adapted to face a magnetic recording medium, and a narrow groove formed in the same principal surface and crossing the main groove at right angles thereto. The main and narrow grooves are filled with a non-magnetic material. The magnetic member carries thereon a laminate formed immediately above the intersection of the main and narrow grooves, and consisting at least of a thin-film conductor coil, an interlayer insulating film, a main pole film and a head-protecting film which are formed one upon another. The narrow groove has a width which is larger than that of the main pole film. The magnetic member is connected to the main pole film through a via hole portion. The magnetic member and the laminate have an exposed surface defining the sliding surface, and the magnetic member is exposed in the vicinity of the main pole film.
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Hayashi Naoto
Mine Hideki
Numazawa Junji
Wada Toshiaki
Levy Stuart S.
Nippon Hoso Kyokai
Renner Craig A.
Sumitomo Special Metals Co. Ltd.
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