Patent ID: 11932936
Assignee: SHIN-ETSU CHEMICAL CO., LTD.
Field: Surface technology, coating (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A method for producing a group III compound crystal, comprising:
a base substrate forming step for forming a group III nitride base substrate by a vapor phase synthesis method;
a seed substrate forming step for forming a seed substrate on the base substrate; and
a group III compound crystal forming step for forming a group III compound crystal on the seed substrate by a hydride vapor phase epitaxy method,
wherein the base substrate is
a substrate obtained by molding a powder of a group III nitride obtained by a vapor phase reaction of a Group III chloride and NH3 to prepare a molded body, incorporating a group III metal into the molded body by an impregnation method, and sintering the molded body,
a substrate obtained by molding a powder of a group III nitride obtained by a vapor phase reaction of a Group III chloride and NH3 to prepare a molded body, incorporating a group III compound that becomes a group III metal upon reduction into the molded body by an impregnation method, and nitriding and sintering the molded body, or
a substrate obtained by preparing a mixture by adding and mixing a group III metal to a powder of a group III nitride obtained by a vapor phase reaction of a Group III chloride and NH3, molding the mixture to prepare a molded body, and nitriding and sintering the molded body.