Optical and magnetooptical recording medium having a low thermal

Dynamic information storage or retrieval – Storage medium structure – Optical track structure

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369 13, 428694RL, G11B 724

Patent

active

055770215

ABSTRACT:
An optical recording medium comprises a transparent substrate, a first dielectric layer, a recording layer, a second dielectric layer and a reflecting layer stacked in this order, wherein said first dielectric layer has a thermal conduction coefficient of 0.03 to 0.1 .mu.W/K, said second dielectric layer has a thermal conduction coefficient of 0.01 to 0.03 .mu.W/K, and said reflecting layer has a thermal conduction coefficient of 4 to 12 .mu.W/K, where the thermal conduction coefficient is defined as a product of the thermal conductivity and the layer thickness. The first and/or second dielectric layers may be of an amorphous metal nitride comprising Al and Si and optionally C and having bonds with hydrogen.

REFERENCES:
patent: 5340647 (1994-08-01), Matsubaguchi et al.
patent: 5341349 (1994-08-01), Kagami et al.
patent: 5368986 (1994-11-01), Terao et al.

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