Multi-layered information recording medium, recording apparatus, and recording method
US7184377B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 8, 2003 |
| Grant date | Feb 27, 2007 |
| Priority date | — |
| Expiry date | Sep 10, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/235
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A multi-layered information recording medium including a plurality of recording layers, the multi-layered information recording medium comprising: a user data area for recording user data; and a plurality of spare areas including at least one replacement region, wherein when the user data area includes at least one defect region, the at least one replacement region may be used in place of the at least one defect region, wherein a first spare area of the plurality of spare areas is positioned so as to be contiguous to a first user data area of a first recording layer, a second spare area of the plurality of spare areas is positioned so as to be contiguous to a second user data area of a second recording layer, and the first spare area and the second spare area are positioned approximately at the same radial position on the multi-layered information recording medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.