Irreversible optical recording medium by formation of bubbles having a height limited by the gas source generating them
US7903536B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 23, 2006 |
| Grant date | Mar 8, 2011 |
| Priority date | — |
| Expiry date | Jun 2, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2007/25715
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An irreversible optical recording medium comprises at least an active layer presenting a rear face and a front face designed to receive at least an optical writing radiation. The optical writing radiation enables gas bubbles forming write marks to be formed locally in said active layer by means of a layer forming a gas source arranged on the rear face of the active layer. The layer forming the gas source moreover has a thickness less than or equal to 100 nm so as to limit the height of the bubbles formed in the active layer and therefore to improve tracking when read operations are performed. The layer forming the gas source is preferably made of carbon-doped hydrogenated amorphous silicon oxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.