Cartridge-contained recording medium
US6641890B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 22, 2000 |
| Grant date | Nov 4, 2003 |
| Priority date | — |
| Expiry date | Aug 10, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/211
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a magneto-optical disc contained in a cartridge, a first dielectric layer, signal recording layer, second dielectric layer, and light reflecting layer are sequentially stacked on a substrate having formed grooves, and a first protective layer, print layer using at least one color and second protective layer are sequentially stacked on the light reflecting layer. Thickness of the second protective layer is not smaller than that of the print layer, and thickness of the first protective layer is not smaller than 2 &mgr;m. Thus the recording medium having the print layer on at least one surface maintains a sufficient resistance to corrosion and a good slidableness.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.