Recording apparatus and method, and disk producing method
US7580335B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 6, 2006 |
| Grant date | Aug 25, 2009 |
| Priority date | — |
| Expiry date | Oct 5, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/20
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A sub data recorder to record sub data on an optical-disk recording medium is provided. In one example, a sub data recorder records sub data by forming marks on a reflective layer of an optical-disk recording medium to which main data is recorded as a combination of pits and lands by irradiating laser light having a writing power to the reflective layer, the sub data can be recorded stably. An embodiment provides a recording apparatus to record sub data to an optical-disk recording medium formed from a substrate and at least a reflective layer and cover layer stacked on the substrate and to which main data is to be recorded as a combination of pits and lands formed on the substrate by irradiating laser light having a writing power to the reflective layer to form marks as the sub data on the reflective layer, the apparatus including a read signal generator to generate a read signal by detecting a return part of laser light having a reading power, irradiated to the optical-disk recording medium, a sub data recorder to record the sub data by forming the marks in mark inserting positions on the reflective layer of the optical-disk recording medium, determined in conformity to a predete…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.