[12] Patent
[11] Patent No.:GC0007555  
[45] Date of Publishing the Grant of the Patent: 30/Apr /2018                48/2018  
Number of the Decision to Grant the Patent:2018/125975
Date of the Decision to Grant the Patent:11/Apr/2018

[21] Application No.:GC 2013-23379

[22] Filing Date:21/1/2013

[30] Priority:

[33] State [32] Priority date [31] Priority No.
DE
24/1/2012
102012200992.2

[72] Inventors:1- Dr. Hanns Wochner،2- Dr. Andreas Killinger،3- Dr. Reiner Pech

[73] Owner: Wacker Chemie AG, Hanns-Seidel-Platz 4, Munchen 81737, Germany

[74] Agent: Dennemeyer & Associates

  

 

  

[51]IPC:
Int. Cl.: C01B33/02; C30B29/06 (2006.01)

[56] Cited Documents:

-EP 0 345 618 A2 (UNION CARBIDE CORP [US]) 13 December 1989
-DE 10 2011 077455 Al (WACKER CHEMIE AG [DE]) 17. November 2011
-EP 2 431 329 Al (WACKER CHEMIE AG [DE]) 21. March 2012
 
Examiner: Rami Al-Ghamdi

[54] LOW-DOPANT POLYCRYSTALLINE SILICON CHUNK
[57] Abstract: The invention provides a polycrystalline silicon chunk having a concentration of 1-50 ppta of boron and 1-50 ppta of phosphorus at the surface.
No. of claims: 10


 

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