Container and method for mitigating metal contact contamination of polysilicon
A technology for polysilicon and containers, applied in the field of containers and methods for reducing metal contact pollution of polysilicon, capable of solving problems such as restriction or even rejection, polysilicon pollution, etc.
Active Publication Date: 2019-02-01
SHAANXI NON FERROUS TIAN HONG REC SILICON MATERIAL CO LTD
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- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
At any moment polysilicon is in contact with a surface, so there is a risk of polysilicon being contaminated by that surface material
If the level of contamination exceeds certain industry regulations, the ability to sell said material into these end applications can be limited or even rejected
Method used
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Embodiment 1
[0032] The favorable selection of microcellular elastomeric polyurethanes as protective linings for containers over other potential lining materials is illustrated by studies of the abrasion resistance properties of potential lining materials. Consider abrasion as the most likely means of causing protective lining failure. Therefore, accelerated wear tests have been deployed to identify selected materials.
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Abstract
The present disclosure relates to reducing or mitigating metal contamination of polysilicon when stored or stored in containers that are constructed at least in part from metal and / or have polysilicon contact surfaces that are at least partially metallic. In particular, the present disclosure relates to a method of mitigating metal contamination from polysilicon contacting the metal surface of a container by providing the surface with a protective layer comprising a microcellular elastomeric polyurethane.
Description
[0001] Cross References to Related Applications [0002] This application claims priority to US Provisional Application No. 61 / 724,844, filed November 9, 2012, which is hereby incorporated by reference in its entirety. technical field [0003] The present disclosure relates to an improved container for polysilicon and a method of mitigating metal contamination of the polysilicon contained therein. Background technique [0004] Ultra-high-purity silicon is widely used in the electronics and optoelectronic industries. For these applications, the purity required by the industry is extremely high, and often only materials with trace contamination measured at ppb (parts per billion) levels are considered acceptable. Polysilicon of this high purity is possible by strictly controlling the purity of the reactants used to make it, but on the other hand extreme care must be taken in any handling, packaging or shipping operation to avoid post-contamination. At any point the polysilic...
Claims
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IPC IPC(8): B65D85/84B65D25/14
CPCB65D25/14
Inventor 罗伯特·J·格尔特森罗伯特·M·戴维森
Owner SHAANXI NON FERROUS TIAN HONG REC SILICON MATERIAL CO LTD