Question: Could you solve the following question ? Float-zone process is used to purify a silicon ingot (300 mm diameter) that contains a uniform aluminum concentration
Could you solve the following question ?

Float-zone process is used to purify a silicon ingot (300 mm diameter) that contains a uniform aluminum concentration of 1x1014 cm-?. One pass is made with a molten zone 5 cm long. Over what distance is the resulting aluminum concentration below 1x1015 cm
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