Optical recording and reproducing method and apparatus having multiple recording layers
US7092343B2 · kind B2 · utility
1Cited by
1References
7Claims
0Family size
Assignee
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Key dates
| Filing date | Jan 22, 2003 |
| Grant date | Aug 15, 2006 |
| Priority date | — |
| Expiry date | Feb 14, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2007/0013
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical recording medium having two or more information recording layers in which information is recorded at a high recording density. The optical recording medium is comprised of information recording layers between a first surface at which light is incident and a second surface opposite the first surface. The first information recording layer nearest to the second surface is a phase-modulation information recording layer, and the second information recording layer is a reflectance-modulation information recording layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.