Surface phenomena encountered in silicon rod production
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I’d appreciate it if an expert could help answer this question. During the growth phase of silicon rods, burly, brush-like protrusions often appear near the edges; they look like mold. Are these caused by contamination, or is it due to poor control of the parameters?
Caused by impurities, including dirty materials or an unclean furnace itself
It is mainly impurities, most of which are caused by dirt inside the furnace.
It’s caused by impurities in the pipes and furnace body!
It’s not the high level of impurities in the raw materials; it’s caused by foreign substances