Patent ID: 6886923

Claim:
A liquid-jet head comprising: a passage-forming substrate in which pressure generating chambers communicating with nozzle orifices are defined, and piezoelectric elements; each piezoelectric element being provided in the passage-forming substrate via a vibration plate, wherein a joint plate, on which driving ICs and a wiring pattern are provided, to an upper portion of which is connected an external wiring, is joined to the piezoelectric element side of the passage-forming substrate, a plurality of driving voltage supply pads, to which a driving voltage to be distributed to each piezoelectric element is supplied, are provided on the driving IC along a long direction of the driving IC, the adjacent driving voltage supply pads being electrically connected by a connection wiring formed of a conductive wire, and the driving voltage supply pad in an end portion of the driving IC in the long direction thereof and the wiring pattern being electrically connected by the connection wiring.