Vitreous silica crucible
US9932692B2 · kind B2 · utility
1Cited by
1References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 30, 2013 |
| Grant date | Apr 3, 2018 |
| Priority date | — |
| Expiry date | Sep 25, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P40/57
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A vitreous silica crucible includes: a substantially cylindrical straight body portion having an opening on a top end and extending in a vertical direction; a curved bottom portion; and a corner portion connecting the straight body portion with the bottom portion and a curvature of which is greater than that of the bottom portion, wherein an inner surface of the crucible has a concavo-convex structure in which groove-shaped valleys are interposed between ridges, and an average interval of the ridges is 5-100 μm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.