Fabricating optical record media
US4619804A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 15, 1985 |
| Grant date | Oct 28, 1986 |
| Priority date | — |
| Expiry date | Apr 15, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B23/0057
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A process for making at least a single-faced, write and/or read optical disk having a sub-layer with a smooth or high-resolution featured surface and the opaque, substantially flat substrate includes the steps of interjecting between the opaque, substantially flat substrate and a transparent, highly polished or featured master mold, a thin layer of viscous composition which is radiation-curable to a solid plastic without undergoing significant shrinkage. The layer of viscous composition is irradiated through the transparent mold to cure the composition to a solid plastic sub-layer having the desired smooth or high-resolution featured surface. After irradiation of the composition, the master mold is removed, leaving the cured plastic sub-layer adhered to the substrate. The substrate is preferably metal, such as aluminum, and the master is preferably glass with an etched featured surface thereon.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.