Quartz glass crucible and manufacturing method thereof
US12371812B2 · kind B2 · utility
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15Claims
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Key dates
| Filing date | Oct 30, 2020 |
| Grant date | Jul 29, 2025 |
| Priority date | — |
| Expiry date | Feb 10, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C2201/54
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A quartz glass crucible (1) has a structure wherein a peak of a distribution of a total concentration of Na, K, and Ca in a depth direction from an inner surface (10i) of the crucible is present at a position deeper than the inner surface (10i). In an exemplary embodiment, the quartz glass crucible is capable of improving the yield of a silicon single crystal by suppressing peeling-off of brown rings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.