Patent ID: 7585058

Claim:
An ink-jet head comprising: a passage unit having a pressure chamber that communicates with an ink ejection port; a piezoelectric actuator that applies pressure to ink in the pressure chamber, and has a piezoelectric member including one or more piezoelectric layers, an individual electrode formed corresponding to the pressure chamber, and a common electrode formed corresponding to the individual electrode, at least one piezoelectric layer being sandwiched between the individual electrode and the common electrode; a first wire member connected to the piezoelectric actuator and having a driver IC that supplies a drive potential to the piezoelectric actuator; and a second wire member connected to the first wire member and having a plurality of supply wires including a control signal supply wire that supplies a control signal to the driver IC; wherein: the first wire member includes a first substrate, a plurality of signal wires, the driver IC connected to the signal wires, a circuit component that electrically connects two or more of the signal wires and has its conductive part exposed, and a plurality of first contacts connected to the respective signal wires; the second wire member includes a second substrate, the supply wires, and a plurality of second contacts connected to the respective supply wires; the corresponding first and second contacts are connected to each other; the circuit component is disposed near any of the first contacts; and all of the first and second contacts, and the circuit component are covered with an insulating tape.