Silicon boats have the same thermal expansion and contraction coefficient with silicon wafers, which can help to avoid scratch and slip problems.
Compared with SiC products, silicon products use higher purity silicon materials (>9N) which can avoid metal contamination issues.
Compared with SiC products, silicon boat can be used despite minor damages or scratches. When the damage is severe, silicon boats can be sent back to DSTC for repair.
The normal lead time for silicon boats is only 3 months, and 45 days in case of emergency.