Patent ID: 8580032

Claim:
A method of manufacturing a monocrystal, the method comprising: providing a monocrystal pulling-up apparatus including: a chamber; a crucible disposed within the chamber and adapted to accommodate a dopant-added melt prepared by adding a volatile dopant to a semiconductor melt, wherein the volatile dopant is arsenic; and a pulling-up portion for pulling up a seed crystal after the seed crystal is brought into contact with the dopant-added melt; calculating a dopant evaporation speed J of the volatile dopant at which the volatile dopant is evaporated from the dopant-added melt a unit time and a unit area using the following formula: J=α√{square root over (X)}e (βN/√{square root over (Y)}) , in which: N represents a concentration of the volatile dopant contained in the dopant-added melt; X represents a flow volume of inactive gas introduced into the chamber; Y represents a pressure in the chamber; and α and β each represent a coefficient; calculating a cumulative evaporation amount of the volatile dopant at a predetermined timing of pulling up based on a product of the calculated dopant evaporation speed J, a cumulative time, and a surface area of the dopant-added melt; and controlling at least one of the flow volume X and the pressure Y so that the cumulative evaporation amount of the volatile dopant becomes a predetermined amount.