Overwritable magnetooptical recording method in which the record

Details Overwritable magnetooptical recording method in which the record Overwritable magnetooptical recording method in which the record

1996-06-19

1998-05-12

Neyzari, Ali

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

369288, 428694EC, G11B 1304

Patent

active

057516693

ABSTRACT:
A light beam modulated according to a data signal to be recorded is irradiates a magnetooptical recording medium while moving the recording medium. During a series of recording operations, a predetermined recording area of the recording medium is heated to a temperature of a second temperature T.sub.2 or higher in accordance with the data signal and at least a part of the area heated to the temperature of second temperature T.sub.2 or higher is once cooled down to a temperature of a third temperature T.sub.3 or lower. Then, it is heated to a temperature of a first temperature T.sub.1 or higher. Thus, the recording medium is locally heated or cooled, so that recording of information is performed.

REFERENCES:
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patent: 5239524 (1993-08-01), Sato et al.
patent: 5309427 (1994-05-01), Matsumoto
patent: 5325343 (1994-06-01), Ohtsuki
patent: 5329505 (1994-07-01), Ohtsuki
"Thermomagnetic Recording Medium For A Direct-Overwrite Recording System," vol. 32, No. 4A, pp. 384-386, XP 39916 (Sep. 1989).
"Initializing Process on Direct Overwrite Method Using Exchange-Coupled Quadri-Layered Magneto-Optical Film," IEEE Transactions on Magnetics, vol. 26, No. 5, pp. 1900-1902, XP150466 (Sep. 1990).

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