Patent ID: 7520038
Filing Date: 2009-04-21
Classification: B41J,H01L,Y10T

Abstract:
1. A method of manufacturing a piezoelectric element comprising the steps of: forming a lower electrode on a substrate; forming a piezoelectric layer by forming on the lower electrode a piezoelectric precursor film in which Pb, Zr and Ti are contained and composition ratio of Pb, Zr and Ti becomes Pb/(Zr+Ti)=1.0 to 1.3 after the piezoelectric precursor film has been baked, and to which at least any one dopant selected from the group consisting of manganese, nickel and strontium is doped, and by then baking the piezoelectric precursor film for half an hour to three hours at 650 to 750° C.; and forming an upper electrode on the piezoelectric layer.