Patent ID: 7699444

Claim:
A liquid droplet-jetting apparatus which jets liquid droplets of a liquid, comprising: a channel unit which is formed with a first channel including a first nozzle and a first pressure chamber communicated with the first nozzle and a second channel including a second nozzle and a second pressure chamber communicated with the second nozzle, the second channel having a same channel structure as that of the first channel; and a piezoelectric actuator which includes a vibration plate arranged on one surface of the channel unit while covering the first and second pressure chambers, a piezoelectric layer arranged to face the first and second pressure chambers on a surface of the vibration plate disposed on a side not facing the channel unit, and a pair of electrodes applying a voltage to the piezoelectric layer, and in which the vibration plate, the piezoelectric layer, and the electrodes are stacked, wherein a portion of one of the vibration plate, the piezoelectric layer, and the electrodes facing the first pressure chamber is thinner than a portion of the one of the vibration plate, the piezoelectric layer, and the electrodes facing the second pressure chamber.