Phase change recording medium
US7858166B2 · kind B2 · utility
2Cited by
15References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 31, 2007 |
| Grant date | Dec 28, 2010 |
| Priority date | — |
| Expiry date | Apr 24, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/21
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
According to one embodiment, in a phase change optical disk which has a substrate and a multi-layered including an interference film, phase change recording film, interface film, and reflecting film, and in which information is reversibly recorded in or erased from the recording film by using light, an element (e.g., Ge or Te) forming the phase change recording film has segregation or a concentration distribution in the thickness direction of the recording film from a portion in contact with the phase change recording film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.