Optical disc
US6404729B1 · kind B1 · utility
6Cited by
9References
6Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jun 21, 1999 |
| Grant date | Jun 11, 2002 |
| Priority date | — |
| Expiry date | Jun 21, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/24082
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical disc comprises; a substrate; grooves concentrically or helically formed on the substrate in each of which data is recorded; lands defined between the adjacent grooves; and prepits formed on the lands, wherein each of the prepits is disposed to be shifted from a center line of the land toward a groove to be paired without overlapping with adjacent tracks, whereby reducing cross-talk from adjacent tracks and improving the density of recorded data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.