Dynamic information storage or retrieval – Storage or retrieval by simultaneous application of diverse... – Magnetic field and light beam
Patent
1996-02-08
1997-05-13
Neyzari, Ali
Dynamic information storage or retrieval
Storage or retrieval by simultaneous application of diverse...
Magnetic field and light beam
360114, 360 59, G11B 1100
Patent
active
056299095
ABSTRACT:
A magneto-optical recording medium consists of a plurality of magnetic layers, and at least one of the plurality of magnetic layers always maintains a magnetization orientation state in which magnetization is oriented in a given direction in a region, where the recording mark string is formed, on a central portion of a recording track, and magnetization is oriented in a direction anti-parallel to the given direction in regions at two sides of the region, where the recording mark string is formed, on side portions of the recording track. With this arrangement, even when recording laser power fluctuates or a tracking control error occurs during an optical modulation over-write operation, generation of an unerased portion of initially recorded information can be suppressed.
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patent: 4955007 (1990-09-01), Aratani et al.
patent: 5132945 (1992-07-01), Osato et al.
patent: 5210724 (1993-05-01), Kobayashi
patent: 5224080 (1993-06-01), Ohtsuki
Canon Kabushiki Kaisha
Neyzari Ali
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