Optical recording medium having ROM area and RAM area
US6667948B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 1, 2000 |
| Grant date | Dec 23, 2003 |
| Priority date | — |
| Expiry date | Mar 23, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/248
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical recording medium and a method for fabricating the same. A read only data region, a writable/readable data region and a content recording region are formed on a transparent substrate. The read only data region is used to store prerecording data which can only be read but is unable to be rewritten. The writable/readable data region is used to read and write data, while the content recording region is used to record initial address information of the recorded data in the read only data region, the writable/readable data region and the content recording region. A recording layer in the writable/readable data region is formed with the derivative of cyanine dye, phthalocyanine dye or azo dye. Or alternatively, the recording layer is made of an alloy containing tellurium, germanium, or antimony, or an alloy containing indium, silver, antimony or tellurium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.