Optical information disk comprising tellurium, selenium and antimony
US4476214A · kind A · utility
5Cited by
2References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 13, 1981 |
| Grant date | Oct 9, 1984 |
| Priority date | — |
| Expiry date | Oct 13, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/165
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical information disk in which information can be written and read optically and which has a substrate plate which on at least one side has a recording layer which satisfies the formula Te.sub.x Se.sub.y Sb.sub.z S.sub.q wherein x=55-85 at. %, y=13-30 at. % z=1-12 at. %, q=0-10 at. % and x+y+z+q=100. Suitable recording layers are Te.sub.60 Se.sub.25 Sb.sub.10 S.sub.5 and Te.sub.75 Se.sub.15 Sb.sub.5 S.sub.5.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.