Optical recording element and its manufacturing method
US4334233A · kind A · utility
18Cited by
3References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 1, 1980 |
| Grant date | Jun 8, 1982 |
| Priority date | — |
| Expiry date | Jul 1, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/252
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical recording element capable of recording and retrieving information by means of beam radiation, comprising a recording layer vacuum deposited onto a protective layer, and an adhesive layer which securely adheres said recording layer to a substrate. The protective layer is prepared from a light-transmitting sheet or plate, with no adhesive layer intervening between the protective layer and the recording layer, so that the influence of dust and bubbles in recording and retrieval can be minimized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.