Methods and systems for purifying elements
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United States of America Patent
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N/A
Issued Date -
Mar 9, 2006
app pub date -
Sep 26, 2003
filing date -
Sep 27, 2002
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
There are provided methods of purifying a material, comprising melting solid material to form liquefied material, directionally solidifying a portion of the liquefied material; and removing a liquid remainder from the purified solidified material. Preferably, the purified solidified material is melted to form re-liquefied purified material, and re-liquefied purified material is removed. Preferably, the material is positioned in a container as it is being purified. The method is particularly useful for purifying elemental material, e.g., semiconductor material such as silicon and/or germanium, such as recycle scrap silicon and/or metallurgical grade silicon. There are also provided systems for carrying out such methods.
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