Patent ID: 7793394

Claim:
A method of producing a piezoelectric actuator having an actuator element, the method comprising: a step for providing a plate-shaped member having two surfaces; a drive section forming step of forming at least one slit in the plate-shaped member using an etching process, wherein at least a portion of a perimeter of the at least one slit defines at least a portion of at least one drive section; a piezoelectric layer forming step of forming a piezoelectric layer on the at least one drive section by depositing particles of a piezoelectric material on a first surface of the two surfaces of the plate-shaped member; an electrode forming step of forming an electrode for applying an electric field in a thickness direction of the piezoelectric layer, which is perpendicular to the first surface of the plate-shaped member, the piezoelectric layer being formed on the electrode; an insulating layer forming step of forming an insulating layer on the first surface of the plate-shaped member, wherein the insulating layer forming step is performed before the piezoelectric layer forming step; and a bending step of bending the at least one drive section, wherein before the piezoelectric layer forming step, in the electrode forming step, the electrode and a wiring, which is to be connected to the electrode, are formed on a surface of the insulating layer, wherein the electrode is arranged on the first surface of the plate-shaped member via the insulating layer, such that the wiring to be connected to the electrode is freely wired on the surface of the insulating layer, and wherein the plate-shaped member is made of a metallic material.