Optical data storage compact disc and method for manufacturing the same
US5533002A · kind A · utility
18Cited by
6References
6Claims
0Family size
Inventor
Key dates
| Filing date | Apr 7, 1994 |
| Grant date | Jul 2, 1996 |
| Priority date | — |
| Expiry date | Apr 7, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2270/22
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical data storage disc, for example, a compact disc, has one side formed with a pattern of indentations defining a digital data recording, and this side is metallized and further coated with a layer, which is embossed with a relief pattern defining a holographic image. The hologram may extend across the whole surface of the disc and is visible from the top side of the disc, while digital information is readable in a conventional manner using a laser directed at the underside of the disc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.