Optical recording media
US7542404B2 · kind B2 · utility
3Cited by
3References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 15, 2005 |
| Grant date | Jun 2, 2009 |
| Priority date | — |
| Expiry date | May 7, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2007/2432
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.