Optical disc having protective films
US6051298A · kind A · utility
22Cited by
6References
33Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 10, 1997 |
| Grant date | Apr 18, 2000 |
| Priority date | — |
| Expiry date | Apr 10, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/21
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A high density optical disc having an optical disc protective structure for enabling a high density information recording and retrieval optical disc. The optical disc includes: a first protective film coated by a few tens of microns, on the reading surface of the optical disc, the first protective film having good transmissivity and high hardness against abrasion; and a second protective film coated by a few microns and having a lower surface energy and a minute molecular structure, providing protection against fingerprints on the surface of the first protective film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.