Method for determining and adjusting the diameter of a single crystal during the pulling of the single crystal

摘要

The present invention raises the cylindrical section 205 of the single crystal 200 and the longitudinal cone 210 of the single crystal 200 from the melt 230 in the crucible 130 of the device 100 for pulling the single crystal 200. the surface of the single crystal as a method for determining the diameter (d _K) of 200, the melt 230, the diameter of the single crystal (200) at the interface with the (d _K) is the melt 230 for the crucible 130 ( 235) is determined in consideration of the first descending speed (v _S ), the first rising speed (v _K ) in which the single crystal 200 is lifted relative to the crucible 130, and the preservation of mass, and The diameter of the single crystal 200 determined during the pulling of the cylindrical section 205 of the single crystal 200 by observing the bright ring on the surface 235 is a correction of the diameter d _K of the single crystal 200 to be determined during the pulling of the single crystal, It relates to a method that is used for validation or comparison.