Optical recording disk
US4889757A · kind A · utility
7Cited by
17References
34Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 19, 1987 |
| Grant date | Dec 26, 1989 |
| Priority date | — |
| Expiry date | Feb 19, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31598
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In an optical recording disk wherein a resin layer cured with ultraviolet radiation is provided on a surface of a transparent substrate, the present invention consists in that a material having a heat distortion temperature of at least 65.degree. C. is employed for the ultraviolet-cured resin layer. The appearance of wrinkles on a UV-cured resin surface is suppressed, whereby an optical recording disk of high carrier-to-noise ratio and long lifetime can be provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.