Magneto-optical recording medium

G - Physics – 11 – B

Patent

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352/32.4

G11B 7/24 (2006.01) G11B 11/105 (2006.01)

Patent

CA 2038785

A magneto-optical recording medium, comprising a substrate, a magneto-optical recording layer on the substrate, a transparent thermally-insulating layer of one selected from the group consisting of tantalum oxynitride and tantalum oxide on the magneto-optical recording layer, and a metal reflecting layer on the transparent thermally-insulating layer, the metal reflecting layer having a thermal conduction represented by a product of a thermal conductivity multiplied by a layer thickness of not less than 1.3 x 10-6WK-1. Heat dispersion is improved while maintaining a high recording sensitivity

L'invention est un support d'enregistrement magnéto-optique comportant un substrat, une couche d'enregistrement magnéto-optique déposée sur ce substrat, une couche thermo-isolante transparente d'oxynitrure de tantale ou d'oxyde de tantale déposée sur la couche d'enregistrement magnéto-optique et une couche métallique réfléchissante déposée sur la couche thermo-isolante transparente, cette couche métallique réfléchissante ayant une conduction thermique représentée par le produit de la conductivité thermique multipliée par une épaisseur de couche non inférieure à 1,3 x 10-6 WK-1. Le support de l'invention a une dispersion thermique améliorée tout en conservant une grande sensibilité d'enregistrement.

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