Optical information carrier
US5604003A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 15, 1995 |
| Grant date | Feb 18, 1997 |
| Priority date | — |
| Expiry date | Jun 15, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31678
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A description is given of an optical information carrier comprising a substrate (1), a thin reflective layer (5), a dielectric layer (7), a phase-change recording layer on the basis of GeTeSe (9), a dielectric layer (11), an opaque metal reflective layer (13) and a protective layer (15). The information carrier can be inscribed, erased and read by means of a laser-light beam a and, in the inscribed state, complies with the CD-industrial standard. The recording layer (9) comprises an alloy having the composition Ge.sub.x Te.sub.y Se.sub.z, in atom %, wherein PA1 47.ltoreq.x.ltoreq.53 PA1 17.ltoreq.y.ltoreq.41 PA1 12.ltoreq.z.ltoreq.30 and PA1 x+y+z.gtoreq.96 and, preferably, equal to 100.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.