Patent ID: 11926924
Assignee: JX METALS CORPORATION
Field: Surface technology, coating (Chemistry)
Classification: CPC C | IPC C

Claim 4:
5. A method for producing an indium phosphide single-crystal ingot,
wherein a crucible is installed in an LEC furnace, raw materials and an encapsulant are installed in the crucible, the raw materials and the encapsulant are heated and melted by a heater, and a seed crystal is brought into contact with a surface of a generated raw material melt and gradually pulled up to grow an indium phosphide single crystal, and
wherein the indium phosphide single crystal is grown by pulling up the seed crystal after increasing a temperature in the LEC furnace from room temperature to between 500° C. and 600° C. while maintaining a vacuum of 15 Pa or less, followed by increasing a pressure in the LEC furnace to any pressure in the range between 2.0×106 Pa and 4.0×106 Pa.