Optical recording and reading method, optical recording and reading apparatus, optical recording medium, and method for producing an optical recording medium
US9007883B2 · kind B2 · utility
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Key dates
| Filing date | Dec 11, 2013 |
| Grant date | Apr 14, 2015 |
| Priority date | — |
| Expiry date | Jan 6, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49826
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical recording medium includes a recording and reading layer that is previously staked or formed afterword and has no concavo-convex pattern for tracking control, and a servo layer in which a concavo-convex pattern or a groove for tracking control is formed. Information can be recorded in the recording and reading layer while tracking is performed using the servo layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.