Patent ID: 8753445
Filing Date: 2014-06-17
Classification: C30B,Y10S,Y10T

Abstract:
1. A method for growing a silicon single crystal by the Czochralski method, the method comprising: providing a heater installed aside a crucible containing silicon melt, the heater having a narrow cross section or a high resistance in a middle region as a localized heating position; and adjusting the heater, by changing the localized heating position, so as to supply a maximum heat output to a portion adjacent to a central plane between the bottom face of the crucible and a solid-liquid interface, and to configure a temperature distribution of the silicon melt such that when a temperature of the crucible is measured along an axis in parallel with a longitudinal direction of a single crystal ingot, the temperature of the crucible, from a hottest point, gradually descends toward the bottom face of the crucible and the solid-liquid interface since convection to the hot zone is promoted, thus controlling a quantity of oxygen dissolution from the crucible.