Metal working – Method of mechanical manufacture – Electrical device making
Patent
1990-08-23
1992-05-19
Hall, Carl E.
Metal working
Method of mechanical manufacture
Electrical device making
360119, 360125, 427131, G11B 542
Patent
active
051135752
ABSTRACT:
Process for producing a magnetic head with an appropriately oriented easy axis of magnetization and head obtained by this process.
According to the invention, a large magnetic pattern (52) is formed around a spacer and then said pattern is etched in order to give it the desired shape. In the narrow horizontal branch, the easy axis of magnetization is oriented parallel to the air gap.
Application to magnetic recording.
REFERENCES:
patent: 4399479 (1983-08-01), Meckel
IBM Technical Disclosure Bulletin, vol. 17, No. 11, Apr. 1975, Armonk, N.Y. U.S.A. pp. 3446-3449; L. T. Ramankiw et al: "Batch Fabrication of Keyhole Type Magnetic Recording Heads."
Patent Abstracts of Japan, vol. 8, No. 183 (P-296) (1620) Aug. 23, 1984, & JP-A-59 072636 (Nippon Denki K.K.) Apr. 24, 1984.
Patent Abstracts of Japan vol. 8, No. 165 (P-291) (1602) Jul. 31, 1984, & JP-A-59 060723 (Fujitsu K.K.) Apr. 6, 1984.
Patent Abstracts of Japan vol. 13, No. 314 (P-899) (3552) Jul. 18, 1989, & JP-A-01 84406 (Sony Corp.) Mar. 29, 1989.
Patent Abstracts of Japan vol. 11, No. 342 (P-635) (2789) Nov. 10, 1987, & JP-A-62 124620 (Yokogawa Electric Corp.) Jun. 5, 1987.
Fedeli Jean-Marc
Moriceau Hubert
Muffato Viviane
Vaudaine Marie-Helene
Commissariat a l''Energie Atomique
Hall Carl E.
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