Dynamic information storage or retrieval – Storage or retrieval by simultaneous application of diverse... – Magnetic field and light beam
Patent
1993-04-29
1994-06-28
Nguyen, Hoa T.
Dynamic information storage or retrieval
Storage or retrieval by simultaneous application of diverse...
Magnetic field and light beam
360114, G11B 1304, G11B 1112, G11B 1110
Patent
active
053253450
ABSTRACT:
When data are thermo-magnetically recorded to a perpendicular magnetized film of a recording medium, it is possible to prevent unnecessary magnetic domains from being formed and unerasable magnetic domains from being produced. The medium 11 is rotated by a motor 12. When being passed through a recording field generated by a magnet 14, the medium 11 is irradiated with a recording beam generated by an optical head 13, so that data can be recorded to a perpendicular magnetized film of the medium 11 as bubble magnetic domains. Further, when the medium 11 passes through a correcting magnetic field generated by a magnet 15 disposed away from the position at which data are recorded, unnecessary and/or unerasable domains can be eliminated.
REFERENCES:
patent: 4882718 (1989-11-01), Kryder et al.
patent: 4910622 (1990-03-01), Saito et al.
Patent Abstracts of Japan, vol. 13, No. 43 (P-821) Jan. 31, 1989 and JP-A-63 239 638 (Canon Inc.) Oct. 5, 1988.
Patent Abstracts of Japan, vol. 14, No. 201 (P-1041) Apr. 24, 1990 and JP-A-2 042 664 (Matsushita Electric Ind. Co. Ltd.) Feb. 13, 1990.
Patent Abstracts of Japan, vol. 15, No. 266 (P-1223) Jul. 5, 1991 and JP-A-3 086 954 (Mitsubishi Electric Corp.) Apr. 11, 1991.
Ishida Masaya
Ito Hiroshi
Mikoshiba Toshiaki
Miyazawa Hiromu
Shimokawato Satoshi
Nguyen Hoa T.
Seiko Epson Corporation
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