Patent ID: 8002389
Filing Date: 2011-08-23
Classification: B41J

Abstract:
1. A liquid jetting apparatus which jets a liquid, the apparatus comprising: a cavity unit having a plurality of nozzles through which the liquid is jetted, and a plurality of pressure chambers which communicate with the nozzles and in which predetermined openings are formed, respectively; and an actuator unit which is stacked on the cavity unit in a predetermined stacking direction, with a predetermined contact surface of the actuator covering the openings of the cavity unit; wherein the actuator comprises: wherein the individual electrodes and the common electrode are arranged to sandwich one of the ceramics layers, and the actuator unit applies a jetting pressure selectively to the pressure chambers by applying a predetermined driving voltage to a portion, of the one of the ceramics layers, sandwiched between one of the individual electrodes and the common electrode; and wherein the barrier layer is stacked at a position of the actuator unit between the contact surface and a certain individual electrode which is closest to the contact surface among the individual electrodes, the position being different from a position on the contact surface such that the barrier layer does not directly contact the cavity unit.