Patent ID: 8732921

Claim:
A method for manufacturing a piezoelectric actuator, the method comprising: a first step of forming a vibration plate, wherein the vibration plate is formed of an insulating material; a second step of forming a plurality of individual electrodes, first terminals and first wirings on a first plane defined by a surface of the vibration plate, the first terminals each being associated with one of the individual electrodes, the first wirings each electrically connecting one of the individual electrodes and one of the first terminals; a third step of forming a piezoelectric layer on surfaces of the individual electrodes, wherein a first surface of the piezoelectric layer defines a second plane different from and positioned above the first plane, wherein the first surface of the piezoelectric layer is opposite to a second surface of the piezoelectric layer contacting the individual electrodes; and a fourth step of forming a common electrode on the second plane defined by the piezoelectric layer and above the first plane on which the individual electrodes are formed, wherein the fourth step includes forming a second terminal and a second wiring together with the common electrode, wherein the second terminal is formed on the first plane defined by the surface of the vibration plate, the second terminal being associated with the common electrode, the second wiring being formed partially contacting the first plane and partially contacting the second plane to electrically connect the common electrode and the second terminal.