Stock material or miscellaneous articles – Composite – Of inorganic material
Patent
1993-06-04
1997-04-08
Kiliman, Leszek
Stock material or miscellaneous articles
Composite
Of inorganic material
428694EC, 428694DE, 428694, 428694RL, 428694TM, 428694BM, 428900, 369 13, 369272, 3692751, 369277, 369283, 369286, G11B 566
Patent
active
056186380
ABSTRACT:
An optical-magnetic recording medium comprising a tracking guide layer and a recording layer disposed on a substrate in which the recording layer is made of a magnetic material having a certain Curie temperature and the guide layer is made of a magnetic material having a certain compensation temperature. Overwriting is conducted on the recording layer of the optical-magnetic recording medium, by previously applying an external magnetic field in the direction of the initial magnetization to the recording medium, and under this state, heating the recording layer higher than the Curie temperature by the irradiation of light, thereby degaussing the recording layer and, at the same time, heating the guide layer higher than the compensation temperature or not heating the layer selectively in accordance with information to be overwritten.
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Ohta, et al; "Magneto-optical Disk with a Reflecting Layer" pp. 18a-18d; Aug. 22, 1985.
"High Speed Overwritable Magneto-Optic Recording", T. Nakao et al., Proc. Int. Symp. on Optical Memory, 1987, Japanese Journal of Applied Physics, vol. 26 (1987) Supp. 26-4, pp. 149-154.
Brother Kogyo Kabushiki Kaisha
Kiliman Leszek
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