Patent ID: 8657418

Claim:
An inkjet head comprising: a fluid channel substrate on which individual liquid chambers are arranged in a short direction, wherein the individual liquid chambers are partitioned by liquid chamber partition walls, and the individual liquid chambers communicate with ink supply ports; an oscillation plate that is formed on a surface facing openings of nozzles disposed in the corresponding individual liquid chambers; actuators, wherein each of the actuators is formed by laminating a lower electrode, a piezoelectric element, and an upper electrode on the oscillation plate; wiring layer patterns configured to supply driving signals to the corresponding actuators, wherein the wiring layer patterns are configured to connect individual electrodes to the corresponding upper electrodes and the wiring layer patterns are configured to connect a common electrode to the corresponding lower electrodes, wherein the wiring layer patterns are formed above the corresponding liquid chamber partition walls; and a supporting substrate in which concave oscillation chambers disposed at positions facing the corresponding actuators are formed, the concave oscillation chambers being partitioned by supporting substrate partition walls, wherein the supporting substrate partition walls are joined to the corresponding liquid chamber partition walls through laminated films including the wiring layer patterns, wherein a width in the short direction of each of the supporting substrate partition walls is smaller than a width in the short direction of each of the liquid chamber partition walls and greater than a width of each of the wiring layer patterns.