Patent ID: 8128207

Claim:
A head chip, comprising: a plurality of liquid jet channels formed in an actuator plate; nozzles that communicate with the plurality of liquid jet channels and that eject liquid from the liquid jet channels; a pair of piezoelectric elements that hold each of the plurality of liquid jet channels therebetween; common electrodes formed on surfaces of the pair of piezoelectric elements on the liquid jet channel side; drive electrodes formed on surfaces of the pair of piezoelectric elements, the surfaces being opposite to the surfaces on which the common electrodes are formed; common terminals connected to the common electrodes and formed on a surface of the actuator plate; an integrated plate that covers a plurality of the common terminals; and an integrated wiring that is formed on a surface of the integrated plate and electrically connects at least a part of the plurality of common terminals, wherein the integrated wiring is connected to the common terminals through through-holes of the integrated plate, and wherein the actuator plate includes integrated terminals connected to the integrated wiring and drive terminals connected to the drive electrodes, the integrated terminals and the drive terminals being arranged at an end thereof.