Thermo-optical data writing process and data medium for performing this process
US4577291A · kind A · utility
16Cited by
8References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 27, 1984 |
| Grant date | Mar 18, 1986 |
| Priority date | — |
| Expiry date | Aug 27, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2007/24314
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention relates to thermo-optical inscription or writing on a data support comprising an organic intermediate layer (2) covered by a metal layer (3). The invention relates to a writing process consisting of creating in the metal layer 3 a plastic deformation as a result of the gaseous pressure exerted due to the local thermal degradation of intermediate layer 2. Inscription produces a bulge-like impression without perforating the metal layer (3). The invention more particularly applies to the thermo-optical inscription and storage of data on an optically readable support by phase or amplitude contrast.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.