Multilayer optical recording medium having three or more recording layers with reduced interlayer crosstalk
US8315147B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 9, 2009 |
| Grant date | Nov 20, 2012 |
| Priority date | — |
| Expiry date | May 10, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/24038
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a multilayer optical recording medium having at least three recording layers, an influence of interlayer crosstalk due to unnecessary light is suppressed. Each of the recording layers includes an information recording area, and the recording layers other than the nearest recording layer and the farthest recording layer when viewed from a light incident side include a first annular area having uneven patterns formed thereon, and a second annular area having uneven patterns formed thereon, the first annular area being adjacent to an inner side of the information recording area, the second annular area being adjacent to an outer side of the information recording area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.