Patent ID: 8557628
Filing Date: 2013-10-15
Classification: C30B

Abstract:
1. A method for growing a zinc oxide (ZnO) single crystal boule within an interior of a physical vapor transport (PVT) furnace system, the method comprising the steps of: placing a ZnO source material inside a first end of an iridium metal crucible and placing a ZnO seed in a second end of the iridium metal crucible wherein the ZnO seed and a surface of the ZnO source material facing the ZnO seed are separated by a first distance; placing the iridium metal crucible containing the ZnO seed and the ZnO source material in a thermal insulation setup; heating the iridium metal crucible containing the ZnO seed and the ZnO source material to obtain a temperature distribution such that a temperature of the ZnO source material (T maintaining a pressure of the interior of the PVT furnace system by flowing a gas mixture through the interior of the PVT furnace system; and maintaining the temperature distribution within the iridium metal crucible to cause growth of the ZnO single crystal boule on the ZnO seed, wherein the ZnO crystal boule comprises lithium (Li) in an atomic concentration less than about 1×10