Patent ID: 7788776

Claim:
A method of producing a piezoelectric actuator for a liquid transporting apparatus, which is provided on one surface of a channel unit in which a liquid channel including a plurality of pressure chambers is formed, and which includes a vibration plate covering the pressure chambers; a plurality of piezoelectric elements arranged, in the vibration plate on a side opposite to the pressure chambers, to correspond to the pressure chambers respectively; and a supporting section which supports these piezoelectric elements from a side opposite to the vibration plate, the method comprising: a step of providing a supporting plate which forms the supporting section, and which has, on one surface thereof, element-arrangement areas in which the piezoelectric elements are to be arranged respectively; a less-deposition area forming step of forming, on the supporting plate, less-deposition areas around the element-arrangement areas respectively; a piezoelectric element forming step of forming the piezoelectric elements by depositing particles of the piezoelectric material more on the element-arrangement areas of the supporting plate than on the less-deposition areas, and a joining step of joining the piezoelectric elements to the vibration plate, such that the piezoelectric elements are arranged between the supporting plate and the vibration plate, wherein the less-deposition areas are configured such that an amount of the piezoelectric particles, per unit area, deposited directly onto the less-deposition areas is less than an amount of the piezoelectric particles, per unit area, deposited onto the element-arrangement areas.