Optical and magnetooptical recording medium having a low thermal conductivity dielectric layer
US5577021A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 26, 1995 |
| Grant date | Nov 19, 1996 |
| Priority date | — |
| Expiry date | May 26, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B11/10586
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.