Patent ID: 11920256
Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Field: Surface technology, coating (Chemistry)
Classification: CPC C  H | IPC C

Claim 6:
7. A method for growing a rare earth oxide crystal, the method comprising:
cleaning a surface of a substrate, the substrate comprising silicon;
forming an amorphous silicon oxide layer on the surface of the substrate after cleaning the surface;
depositing a metal layer comprising a rare earth metal on an upper surface of the amorphous silicon oxide layer, wherein depositing the metal layer is performed at a first temperature in a range from 20° C. to 150° C.;
after depositing the metal layer, forming a first crystal layer comprising the rare earth oxide crystal obtained by oxidizing the rare earth metal on the substrate, wherein forming the first crystal layer is performed at a second temperature that is a temperature at which the rare earth metal reacts with silicon oxide for oxidation; and
forming a second crystal layer by growing the rare earth oxide crystal on the first crystal layer.