High-purity quartz
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High-purity quartz is quartz that has extremely high silicon dioxide (SiO2) purity levels. It is used in the manufacture of fused-quartz crucibles which are used in the manufacture of Polycrystalline silicon for semiconductor and photovoltaic manufacturing, as well other applications.[1]
There is no precise standard for the exact purity level required for quartz to be considered "high-quality quartz", however purities above 99.9% are required for semiconductor manufacturing.[2]
Applications
In semiconductor manufacturing, high-purity quartz is used to produce crucibles employed in the Czochralski process, in which polysilicon is melted at and drawn into a single-crystal ingot.[3]
