Method of preventing polysilicon from being contaminated with metals

Patent metadata

Field	Value
Publication number	US-9828250-B2
Application number	US-201013394009-A
Country	US
Kind code	B2
Filing date	Sep 17, 2010
Priority date	Sep 30, 2009
Publication date	Nov 28, 2017
Grant date	Nov 28, 2017

Abstract

[Problems] To provide a method of preventing the polysilicon from being contaminated with metals by providing a resin cover on the surface of a metal substrate that comes in contact with the polysilicon, wherein the metal surfaces are reliably prevented from being exposed that is caused by the wear of the cover.
[Means for Solution] A method of preventing the polysilicon from being contaminated with metals caused by the contact of the polysilicon with a metal substrate by providing a resin cover on the surface of the metal substrate, wherein the resin cover 3 comprises two kinds of resin sheets 3 a and 3 b overlapped one upon the other.

First claim

The invention claimed is:

1. A member to be contacted with polysilicon arranged at a position where the polysilicon comes into contact therewith, wherein:
said member to be contacted with the polysilicon is a chute, a hopper, or a crusher bed arranged in a course of up to introducing the polysilicon right after it is produced into a step of producing single crystals of silicon,
wherein said member to be contacted with the polysilicon comprises a metal substrate and a resin cover provided on said metal substrate,
said resin cover comprises two kinds of resin sheets in a state of being overlapped one upon the other on said metal substrate,
a surface of a resin sheet positioned on an upper surface comes into contact with the polysilicon,
the two kinds of resin sheets are detachably attached to the metal substrate by resin bolts;
the two kinds of resin sheets have flexibilities different from each other, wherein a resin sheet having a higher flexibility is arranged on a lower side, and a sheet having a lower flexibility is arranged on an upper side where the polysilicon comes into contact therewith,
the two kinds of resin sheets have color tones different from each other; and the resin sheet having the higher flexibility, and which is arranged on the lower side, is closely attached to an entire surface of the metal substrate.

Assignees

• Kondou Manabu
• Yoshimura Reiji
• Tokuyama Corp

Inventors

• Kondou Manabu
• Yoshimura Reiji

Classifications

• B01J19/02

  Apparatus characterised by being constructed of material selected for its chemically-resistant properties · CPC title

• Y10T29/49826

  Assembling or joining · CPC title

• C01B33/02 Primary

  Silicon (forming single crystals or homogeneous polycrystalline material with defined structure C30B) · CPC title

• Y10T428/24008

  including fastener for attaching to external surface · CPC title

• Y10T29/49964

  At least one part nonmetallic · CPC title