Patent ID: 6896729
Filing Date: 2005-05-24
Classification: C30B,Y10T

Abstract:
1. A method of growing a semi-insulating gallium arsenide (GaAs) material by controlled incorporation of carbon gas as a dopant, the method comprising the steps of: providing a crucible having a seed region; placing a seed crystal in the seed region inside the crucible; loading a GaAs raw material into the crucible; loading a boric oxide (B providing an ampoule having a lower region and an upper region; providing the crucible containing the seed crystal, GaAs raw material, and B providing a solid carbon substance in the lower region of the ampoule outside the crucible; sealing under vacuum the ampoule containing the solid carbon substance and the crucible; and heating the sealed ampoule in a controlled manner causing the GaAs raw material to melt, the heat interacting with the solid carbon substance to produce a carbon gas which interacts with the GaAs melt through the B cooling the sealed ampoule in a controlled manner.