Glass substrate for magnetic disk and method for manufacturing
US6553788B1 · kind B1 · utility
15Cited by
10References
29Claims
0Family size
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Key dates
| Filing date | Feb 22, 2000 |
| Grant date | Apr 29, 2003 |
| Priority date | — |
| Expiry date | Feb 22, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24355
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of manufacturing a glass substrate for a magnetic disk. The method includes the step of scrub-etching the glass substrate using a pad in the presence of an acid treatment solution. As the acid treatment solution, hydrofluoric acid is used in a range of 0.01 to 1 wt %. The scrub-etching step is performed at temperatures ranging from 5 to 60° C. for 1 second to 300 seconds. The method produces a substrate that is substantially free of asperity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.