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US 2006/0077869 A1Published application
Optical recording media
AssigneeKabushiki Kaisha Toshiba
InventorsKeiichiro Yusu, Sumio Ashida, Tsukasa Nakai, Shinichi Tatsuta, Hideki Ito
Life of this patent
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Abstract
An optical recording media has a disc substrate and two or more recording layers arranged apart from each other with a dielectric layer interposed therebetween to cause optical change simultaneously by irradiation with light, in which a first recording layer positioned near the disc substrate has a higher optical change temperature and a higher extinction coefficient compared with those of a second recording layer and a later recording layer.
Claims22
An optical recording media, comprising:
- a disc substrate;
- and
- two or more recording layers arranged apart from each other with a dielectric layer interposed therebetween to cause optical change simultaneously by irradiation with light,
- wherein a first recording layer positioned near the disc substrate has a higher optical change temperature and a higher extinction coefficient compared with those of a second recording layer and a later recording layer.
1 more element
An optical recording media, comprising:
- a disc substrate;
- and
- two or more recording layers arranged apart from each other with a dielectric layer interposed therebetween to cause optical change simultaneously by irradiation with light,
- wherein a first recording layer positioned near the disc substrate has a lower optical change temperature and a lower extinction coefficient compared with those of a second recording layer and a later recording layer.
1 more element
Dependencies are inferred from the claim text.