Memory disc substrate with defect free surface
US5993914A · kind A · utility
0Cited by
11References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 31, 1998 |
| Grant date | Nov 30, 1999 |
| Priority date | — |
| Expiry date | Jul 31, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B23/0064
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention is directed to a defect-free magnetic memory disc substrate. In particular, it is directed to a composite alumina-based, glass-coated, article with a defect free surface. Several methods for its manufacture including frit bonding, molten glass submersion, and tape formation are disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.