A new doping procedure for keeping the dopant concentration of the crystal constant in a continuous Czochralski method, using a double-walled crucible, is proposed. In this method the initial concentrations in the inner and the outer crucibles are set to be equal. Therefore, the equalizing phenomena of the concentrations between the two crucibles in the initial stage do not have to be considered. The strategy for doping control in this new method is analyzed using a one-dimensional mathematical model.
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