Magneto-optical recording medium including a plurality of record

Details Magneto-optical recording medium including a plurality of record Magneto-optical recording medium including a plurality of record

1993-10-18

1995-05-30

Nguyen, Hoa T.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Thermomagnetic recording or transducers

369 13, G11B 1304, G11B 1112, G11B 1110

Patent

active

054207282

ABSTRACT:
A magneto-optic recording medium is formed from a plurality of perpendicularly magnetized thin film layers, each of which is capable of recording and reproducing information. The layers are mounted on a transparent substrate which is exposed to an incident laser. Layers farther from the incident substrate have a higher Curie temperature than closer layers. Recording on multiple layers is possible because information from a desired layer is successively transferred to layers closer to the incident beam for reading the information as recording is done on layers closer to the substrate. Information in a closer layer is stored in secondary data storage when farther layers are read and then rerecorded.

REFERENCES:
patent: 4908809 (1990-03-01), Tadokoro et al.
patent: 4932012 (1990-06-01), Kobayashi
patent: 5018119 (1991-05-01), Aratani et al.
patent: 5025430 (1991-06-01), Takoko et al.

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