Patent ID: 6953241

Claim:
An ink-jet head, comprising: a passage unit including a plurality of pressure chambers each having one end coupled to a nozzle and the other end to be coupled to an ink supply source, the plurality of pressure chambers being arranged along a plane so as to neighbor each other; and a plurality of actuator units attached to a surface of the passage unit for changing the volume of each of the pressure chambers, each actuator unit including a plurality of pressure generation portions respectively corresponding to pressure chambers, each of the actuator units being formed to extend over the pressure chambers, the plurality of actuator units being arranged along the longitudinal direction of the passage unit so that neighboring actuator units partially overlap each other in the lateral direction of the passage unit, each of the actuator units comprising: a basic region where a large number of pressure generation portions are formed in a matrix; and an additional region neighboring the basic region in the lateral direction of the passage unit, where pressure generation portions are formed to correspond to a gap portion between the pressure generation portions in the basic region of the each of the actuator units and the pressure generation portions in the basic region of another actuator unit neighboring the actuator unit.