Patent ID: 7984977

Claim:
A method of manufacturing a piezoelectric body formed of a film comprised of an ABO 3 perovskite oxide crystal epitaxially grown on a substrate, comprising: forming a film containing an AO x crystal and the ABO 3 perovskite oxide crystal by using an oxide containing an A element and a B element on the substrate heated to a temperature at which the AO x crystal and the ABO 3 perovskite oxide crystal are formed; and successively changing the film containing the AO x crystal and the ABO 3 perovskite oxide crystal into the film comprised of the ABO 3 perovskite oxide crystal by heating in an atmosphere containing oxygen the substrate to a temperature which exceeds a temperature at which the AO x crystal can be present, and which is at least a temperature at which the ABO 3 perovskite oxide crystal is formed.