Erasable optical recording method
US4797871A · kind A · utility
3Cited by
2References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 15, 1986 |
| Grant date | Jan 10, 1989 |
| Priority date | — |
| Expiry date | Sep 15, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/243
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The method comprises the steps of: PA0 a. providing an optical recording element comprising an amorphous thin film of a GeTe alloy; PA0 b. preparing the thin film for writing and erasing cycles by crystallizing the film; PA0 c. writing on selected portions of the prepared film with modulated laser beam, thereby converting portions on the films to a phase-segregated amorphous state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.