Patent ID: 11898266
Assignee: HANGZHOU GAREN SEMICONDUCTOR CO., LTD.
Field: Surface technology, coating (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A method for growing a gallium oxide single crystal by casting, comprising the following steps:
1) Heating a solid gallium oxide to complete melting, cooling to a melting point of the gallium oxide, and maintaining a melt state for at least 30 min; and
2) conducting gradient cooling on a gallium oxide melt obtained in step 1) until a solid gallium oxide single crystal is obtained, wherein the gradient cooling is to cool the gallium oxide melt obtained in step 1) to a first temperature according to a first gradient, and then continue cooling to a room temperature according to a second gradient to obtain the gallium oxide single crystal, and
in step 1), since the solid gallium oxide is heated to the first temperature, oxygen with a volume fraction of 2-10% is present in a growth atmosphere; and the growth atmosphere comprises an inert gas;
wherein:
a cooling rate of the first gradient is 10-20° C./h;
a cooling rate of the second gradient is 30-60° C./h;
the first temperature is 1,500-1,700° C.; and
the method does not use a single crystal seed.