Dynamic information storage or retrieval – Storage medium structure – Optical track structure
Patent
1995-05-04
1997-08-26
Edun, Muhammad N.
Dynamic information storage or retrieval
Storage medium structure
Optical track structure
369286, 369283, 369 13, 369100, G11B 700
Patent
active
056617160
ABSTRACT:
A magneto-optical recording medium includes a substrate, a first magnetic layer formed on the substrate and constituted by a perpendicular magnetization film, a dielectric layer formed on the first magnetic layer at a side opposite to the substrate, a second magnetic layer formed on the first magnetic layer through the dielectric layer, and a third magnetic layer magnetically coupled to the second magnetic layer. Each of the first, second and third magnetic layers essentially consists of a rare earth-transition metal amorphous alloy. The first magnetic layer has a film thickness to allow transmission of light incident from the substrate to the dielectric layer while the second magnetic layer has a film thickness which does not allow transmission, of light passing through the first magnetic layer, to the third magnetic layer.
REFERENCES:
patent: 5428597 (1995-06-01), Satoh et al.
patent: 5511057 (1996-04-01), Holtslag et al.
IEEE Translation Journal of Magnetics in Japan, vol. 7, No. 9, Sep. 1992, pp. 685-693, Kaneko, et al., "Super Resolution in Optical Disks".
Canon Kabushiki Kaisha
Edun Muhammad N.
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