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Polycrystalline silicon rod and process for production thereof
US8999516B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8999516-B2 |
| Application number | US-201313886439-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 3, 2013 |
| Priority date | May 7, 2012 |
| Publication date | Apr 7, 2015 |
| Grant date | Apr 7, 2015 |
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Abstract
Official abstract text for this publication.
The invention provides a polycrystalline silicon rod having a total diameter of at least 150 mm, including a core A having a porosity of 0 to less than 0.01 around a thin rod, and at least two subsequent regions B and C which differ in porosity by a factor of 1.7 to 23, the outer region C being less porous than region B.
First claim
Opening claim text (preview).
What is claimed is: 1. A polycrystalline silicon rod having a total diameter of at least 150 mm, comprising: a core A having a porosity of 0 to less than 0.01, which is around a thin rod; a region B around core A; and a region C around region B, wherein regions B and C differ in porosity by a factor of 1.7 to 23, and region C is less porous than region B. 2. The polycrystalline silicon rod as claimed in claim 1 , wherein core A extends up to a diame…
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Chemistry & Metallurgy · mapped topic
- C01B33/02Primary
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
- C01B33/035Primary
Chemistry & Metallurgy · mapped topic
Cross-Sectional Technologies · mapped topic
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Frequently asked questions
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- What does patent US8999516B2 cover?
- The invention provides a polycrystalline silicon rod having a total diameter of at least 150 mm, including a core A having a porosity of 0 to less than 0.01 around a thin rod, and at least two subsequent regions B and C which differ in porosity by a factor of 1.7 to 23, the outer region C being less porous than region B.
- Who is the assignee on this patent?
- Wacker Chemie Ag
- What technology area does this patent fall under?
- Primary CPC classification C01B33/02. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Apr 07 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).