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

Claim 14:
15. A method for growing a rare earth oxide crystal, the method comprising:
forming an amorphous silicon oxide layer on a silicon substrate;
forming a metal layer comprising a rare earth metal in contact with an upper surface of the amorphous silicon oxide layer, wherein forming the metal layer is performed in a chamber under first conditions in which a first temperature of the silicon substrate is maintained in a first range of 20° C. to 150° C.;
after forming the metal layer, reacting the amorphous silicon oxide layer with the metal layer to form a first crystal layer comprising the rare earth oxide crystal obtained by oxidizing the rare earth metal on the silicon substrate, wherein reacting the amorphous silicon oxide layer is performed in the chamber under second conditions in which the silicon substrate is heated from the first temperature to a second temperature of 750° C. and then reduced to a third temperature that is between the first temperature and the second temperature; and
growing the rare earth oxide crystal on the first crystal layer to form a second crystal layer, wherein growing the rare earth oxide crystal is performed in the chamber under third conditions in which the silicon substrate is maintained at the third temperature for a predetermined period of time.