Patent ID: 8940095
Filing Date: 2015-01-27
Classification: C30B,Y10T

Abstract:
1. A single crystal growth apparatus, comprising: a vessel; a crystal growth seed mounting area in the vessel; a crystal growth area in the vessel adjacent to the crystal growth seed mounting area; a synthesizing melt area in the vessel; a thermal barrier separating the crystal growth area from the synthesizing melt area, the thermal barrier containing at least one opening connecting the crystal growth area to the synthesizing melt area; a growth melt; a synthesizing melt; a solute source, wherein the solute source has a chemical composition substantially different than the synthesizing melt; a solute feeder adapted to provide a solute into the synthesizing melt area during crystal growth; a heating element adapted to heat the vessel to form the growth melt in the crystal growth area and to form the synthesizing melt in the synthesizing melt area, wherein the vessel is oriented vertically, such that the crystal growth seed area is located on a bottom of the vessel, the synthesizing melt area is at a top of the vessel and the crystal growth area is located between the seed and the synthesizing melt area, and wherein: the vessel comprises a first crucible containing the crystal growth seed area and the growth melt area and a second crucible containing the synthesizing melt area; the thermal barrier comprises a bottom wall of a second crucible containing the at least one opening; and the second crucible is located at least partially in the first crucible.