Dual layer optical storage medium having partially reflecting layer comprising amorphous selenium
US6678237B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 27, 1997 |
| Grant date | Jan 13, 2004 |
| Priority date | — |
| Expiry date | Apr 30, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/2534
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A multi-layer optical storage medium includes a transparent substrate, a partially reflective layer, a transparent spacer, and a highly reflective layer. One pattern of data pits is provided on the substrate, adjacent the partially reflective layer, and another pattern of pits is provided on the spacer layer, adjacent the highly reflective layer. The partially reflective layer may be made of amorphous selenium (a-Se) and preferably has an index of refraction having a real component, n, greater than 2.8 and an imaginary component, K, less than 0.01. The invention also includes the optical data storage systems compatible with such media.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.