Use of quartz plates during growth of single crystal silicon ingots
US-12146236-B2 · Nov 19, 2024 · US
Vitreous silica crucible provided with mineralizer on its inner surface and method of manufacturing silicon ingot using same
US9109300B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9109300-B2 |
| Application number | US-201113179280-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 8, 2011 |
| Priority date | Jul 20, 2010 |
| Publication date | Aug 18, 2015 |
| Grant date | Aug 18, 2015 |
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Abstract
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The present invention provides a vitreous silica crucible which can suppress buckling and sidewall lowering of the crucible in multi-pulling. According to the present invention, provided is a vitreous silica crucible for pulling a silicon single crystal, comprising a mineralizer on an inner surface of the crucible, wherein the mineralizer contains at least one atoms selected from the group consisting of Ca, Sr, Ba, Ra, Ti, Zr, Cr, Mo, Fe, Co, Ni, Cu, and Ag, and the concentration of the mineralizer on the inner surface is 1.0×10 5 to 1.0×10 17 atoms/cm 2 .
First claim
Opening claim text (preview).
What is claimed is: 1. A vitreous silica crucible for pulling a silicon single crystal, comprising a mineralizer disposed only on an entire innermost surface of the crucible, wherein the mineralizer contains at least one atoms selected from the group consisting of Ca and Fe, and the concentration of the mineralizer on the inner surface is 1.0×10 8 to 3.0×10 11 atoms/cm 2 as measured by spraying a cleaning liquid for dissolving the mineralizer onto the inner surface to capture th…
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- C30B15/10Primary
Chemistry & Metallurgy · mapped topic
Cross-Sectional Technologies · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
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Frequently asked questions
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- What does patent US9109300B2 cover?
- The present invention provides a vitreous silica crucible which can suppress buckling and sidewall lowering of the crucible in multi-pulling. According to the present invention, provided is a vitreous silica crucible for pulling a silicon single crystal, comprising a mineralizer on an inner surface of the crucible, wherein the mineralizer contains at least one atoms selected from the group cons…
- Who is the assignee on this patent?
- Sudo Toshiaki, Kishi Hiroshi, Sumco Corp
- What technology area does this patent fall under?
- Primary CPC classification C30B15/10. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Aug 18 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).