Patent ID: 7223305

Claim:
A method of manufacturing a potassium niobate (KNbO 3 ) single crystal thin film, comprising the steps of: maintaining the substrate under a predetermined oxygen partial pressure; maintaining the substrate within a temperature region which is equal to or higher than an eutectic temperature of KNbO 3 and 3K 2 O.Nb 2 O 5 and is equal to or lower than complete melting temperature of KNbO 3 and 3K 2 O.Nb 2 O 5 so that a solid phase of KNbO 3 and a liquid phase can coexist on the substrate; depositing a vapor phase material on the substrate in a state in which a solid phase and a liquid phase coexist; and precipitating KNbO 3 on the substrate from the liquid phase as a solid phase to grow a KNbO 3 single crystal thin film.