Optical disk having data stored on a land portion and a groove portion with the land portion having a greater width than the groove portion
US5991258A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 1997 |
| Grant date | Nov 23, 1999 |
| Priority date | — |
| Expiry date | Feb 28, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/24079
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical disk and its recording and playback method. The optical disk has a groove portion and a land portion, in which the land portion is at a distance of greater than or equal to 100 nm from the groove portion and the land portion has a land width greater than a groove width of the groove portion. The method includes recording the data on a groove portion and a land portion of the optical disk; and playing back the recorded data with a land reflectivity equal to groove reflectivity when the land portion is at a distance of greater than or equal to 100 nm from the groove portion and a land width of the land portion is greater than a groove width of the groove portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.