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Semiconductor-grade polysilicon is purified to eleven nines — one impurity atom in a hundred billion. Solar-grade needs only six or seven, and that difference is why the two markets diverged.
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Chemical plant · United States
Hemlock Semiconductor Polysilicon Plant
One of the largest Western producers of semiconductor-grade polysilicon.
Pueblo Chemical Agent-Destruction Pilot Plant Cooling Tower… ·
PEO ACWA ·
CC BY 2.0
· Wikimedia Commons
