Question
Calculate the mass of phosphorus required to make a silicon crystal with 107 cm doping density, if the initial melt load of silicon is 50 kg. The density of silicon in the melt is 2.5 g cm³ and phosphorus has an atomic weight of 30.97u. Assume that the segregation coefficient ko=0.35 is constant throughout the growth process.
Answer :
Word Count : 214
To calculate the mass of phosphorus required for doping, we first determine the total number of silicon atoms in the melt. The volume of the melt is calculated using the mass and density of silicon: $$ \text{Volume of Si melt} = \frac{\text{mass}}{\text{density}} = \frac{50,000 \text{ g}}{2.5 \text{ g/cm³}} = 20,000 \text{ cm³} $$ ___ ______ ________ ______ _____ _______ ___.
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To calculate the mass of phosphorus required for doping, we first determine the total number of silicon atoms in the melt. The volume of the melt is calculated using the mass and density of silicon: $$ \text{Volume of Si melt} = \frac{\text{mass}}{\text{density}} = \frac{50,000 \text{ g}}{2.5 \text{ g/cm³}} = 20,000 \text{ cm³} $$ ___ ______ ________ ______ _____ _______ ___.
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