Optical information recording medium and optical disk drive
US6842419B2 · kind B2 · utility
3Cited by
2References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 22, 2002 |
| Grant date | Jan 11, 2005 |
| Priority date | — |
| Expiry date | Jul 31, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2007/25713
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical information recording medium includes a substrate, first information recording layer, and second information recording layer. The first information recording layer includes a recording film, first dielectric film whose complex index has a real part n1, second dielectric film whose complex index has a real part n2, and third dielectric film whose complex index has a real part n3. Relationships n1>n2 and n3>n2 are satisfied.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.