Optical recording disk
US5036510A · kind A · utility
1Cited by
4References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 26, 1988 |
| Grant date | Jul 30, 1991 |
| Priority date | — |
| Expiry date | May 26, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/24056
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical recording disk of air sandwich type includes a transparent disk carrying a transferring layer and a protection disk which are symmetrically disposed with respect to a central plane between the transparent and protection disks, the protection disk being the same as the transparent disk in material and shape and having a dummy layer which is the same as the transferring layer in material and shape.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.