Patent ID: 7559128

Claim:
A method of manufacturing a piezoelectric/electrostrictive device which comprises a substrate section, and an operation section disposed on the substrate section, which includes at least one piezoelectric/electrostrictive film and a plurality of electrode films, so that the piezoelectric/electrostrictive device is capable of operating by displacement of the operation section, wherein the at least one piezoelectric/electrostrictive film and the electrode films are alternately laminated so that an uppermost layer and a lowermost layer of the operation section are defined by the electrode films, and wherein the operation section and the substrate section are integrated by firing, the method comprising the steps of: providing a conductor material, including 0.3 to 8 mass % titanium oxide, as a material of the electrode film defining the lowermost layer of the operating section in contact with the substrate section; and performing a heat treatment step of the conductor material and the substrate section at a temperature in a range of 1200° C. to 1450° C. so that a titanium element from the conductor material is diffused into the substrate section.