Patent ID: 7537320

Claim:
A liquid transporting apparatus comprising: a channel unit having a plurality of pressure chambers arranged along a plane; and a piezoelectric actuator which is arranged on a surface of the channel unit and which changes volume of the pressure chambers to apply pressure to liquid in the pressure chambers; wherein the piezoelectric actuator includes a vibration plate which covers the pressure chambers and which has a first surface opposite to the pressure chambers wherein the first surface opposite to the pressure chambers is smooth, a piezoelectric layer arranged continuously in a direction parallel to the plane on the first surface of the vibration plate, a plurality of individual electrodes each of which is arranged at an area overlapping with a central portion of one of the pressure chambers as viewed in a direction perpendicular to the plane, and a common electrode which sandwiches the piezoelectric layer between the individual electrodes and the common electrode; and wherein grooves are formed on a second surface of the vibration plate facing the pressure chambers, each of the grooves being formed at an area which is outside of an area which overlaps with both of one of the individual electrodes and the common electrode as viewed in the direction perpendicular to the plane.