Optical storage medium with improved substrate structure to provide uniform signal quality
US6646978B2 · kind B2 · utility
2Cited by
3References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 20, 2001 |
| Grant date | Nov 11, 2003 |
| Priority date | — |
| Expiry date | Jan 15, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B11/10584
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical storage medium includes a substrate having grooves and lands. A first dielectric layer overlies the substrate. A recording layer overlies the first dielectric layer. A second dielectric layer overlies the recording layer, and a light transmitting layer overlying the second dielectric layer. Each of the grooves is larger in width than adjacent two of the lands.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.