Glass substrate of disk for recording information, a disk for recording information, and a disk device for recording information
US6136401A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 20, 2000 |
| Grant date | Oct 24, 2000 |
| Priority date | — |
| Expiry date | Jan 20, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/21
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In accordance with the present invention, a glass substrate of a disk for recording information, containing oxides of rare earth elements and fine particles dispersed therein, and a disk for recording information and a disk apparatus for recording information using the glass substrate of the disk are provided. The glass substrate of the disk for recording information having preferable mechanical characteristics, as well as superior chemical stability, thermal stability, flatness, and transparency is provided, and a disk for recording information and a disk apparatus for recording information using the glass substrate of the disk are provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.