Method of fabricating glass substrate for magnetic disk and method of fabricating magnetic disk
US6134918A · kind A · utility
25Cited by
4References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 29, 1997 |
| Grant date | Oct 24, 2000 |
| Priority date | — |
| Expiry date | Dec 29, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/8404
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The surface of a glass substrate withdrawn from a chemically strengthening treatment liquid is processed with a heated acid (for example, a thermal concentrated sulphuric acid at a temperature of over 100.degree. C., or a water soluble organic solvent such as glycerol or polyethylene glycol). Consequently, precipitated fused salt can be effectively removed without damaging the glass substrate and the change in quality of the glass surface can be also prevented at a high level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.