Phase-change optical recording medium and recording and reproducing method thereof
US7626915B2 · kind B2 · utility
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9Claims
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Key dates
| Filing date | Dec 14, 2005 |
| Grant date | Dec 1, 2009 |
| Priority date | — |
| Expiry date | Jun 26, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2007/24312
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The phase-change optical recording medium having a substrate, and at least a first protective layer, a recording layer composed of a phase-change material, a second protective layer and a reflective layer disposed on the substrate in this sequence has a maximum recording linear velocity VH of 20 m/s to 60 m/s, a range of linear velocity recordable even when the recording linear velocity is continuously changed of 0.3VH to 1.0VH, and no occurrence of crystals causing a reproduction error in recorded marks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.