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- Upgrading Metallurgical Silicon 98-99% Si - Current processes face challenges in B removal - SSI has developed a process to lower it to 1ppm - SSI process can lower the other impurities to produce 99.99% (4N) Silicon
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February 26, 2014
1
Lower cost feed stock is required.
Siemens’ process feed stock is good purity (>7N) but is expensive◦ Was >$50/kg
◦ With bulk production ~$25/kg in China
2Contact michael@avantimac.com for more information
Current processes face challenges in B removal
SSI has developed a process to lower it to 1ppm
SSI process can lower the other impurities to produce 99.99% (4N) Silicon
3Contact michael@avantimac.com for more information
Expect cost ~$15/kg
Do further R&D to lower cost
Run Directional Solidification on 250+kg to produce brick
Produce wafers◦ To confirm %energy conversion
4Contact michael@avantimac.com for more information
Element Silicon Lump (ppm)
B <DLP 3
Al 179
Ce 17
Cr 91
Cu 43
Mo 11
Ni 94
Sc 25
Ta 3
Zn <DL
Zr 38
Total Impurities 1000
5Contact michael@avantimac.com for more information
Contact michael@avantimac.com for more information 6
Element Silicon Powder After Refining (ppm)
B <DLP <DLAl 14Ce 3Cr <DLCu <DLMo <DLNi <DLSc 23Ta <DLZn <DLZr <DL
Total Impurities 64
7
Michael Dehn, CEO
Avanti Management & Consulting Limited
tel 647-477-2382
cel 416-301-4949
michael@avantimac.com
www.avantimac.com
Contact michael@avantimac.com for more information
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