Patent attributes
A piezoelectric actuator of an ink-jet head as a liquid transporting apparatus includes a vibration plate which also serves as a common electrode, a piezoelectric layer arranged on the vibration plate on a side opposite to pressure chambers, and individual electrodes arranged on a surface of the piezoelectric layer on a side opposite to the vibration plate, at areas each of which overlaps in a plan view with an edge portion of one of the pressure chambers. Recesses are formed on a surface of the vibration plate on the side opposite to the pressure chamber, at areas each of which overlaps with a central portion of one of the pressure chambers, and a stiffness of the vibration plate is reduced partially. Therefore, the vibration plate can be deformed substantially at a low drive voltage. Accordingly, a liquid transporting apparatus which includes the piezoelectric actuator having excellent drive efficiency is provided.
