I think it would be more accurate to change the name of the polycrystaline silicon to the Boule.
This is the ingot made in the process that wafers are sliced from.
Also, I don't believe the 'molten' silicon is ever exposed to air. I think that pipes should be used to transport this 'molten' silicon to be processed into Boules.
Wafers shoud be made from Boules (Poly silicone ingots)
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