Patent ID: 7658474

Claim:
A liquid transporting apparatus comprising: a channel unit having a plurality of pressure chambers arranged along a plane; and a piezoelectric actuator which applies a pressure to a liquid in the pressure chambers by changing a volume of the pressure chambers, wherein the piezoelectric actuator includes: a vibration plate which covers the pressure chambers; a piezoelectric layer which is arranged on a side of the vibration plate opposite to the pressure chambers and which has a plurality of portions each overlapping with one of the pressure chambers, the portions being connected with each other; a plurality of individual electrodes each of which is arranged in a first area of one surface of the piezoelectric layer, the first area overlapping with an edge portion of each of the pressure chambers as viewed from a direction orthogonal to the plane, the edge portion being a second area other than a central portion of each of the pressure chambers; and a common electrode which is arranged on the other surface of the piezoelectric layer, and wherein each of the individual electrodes, the piezoelectric layer, and the common electrode are extended up to a third area outside of one of the pressure chambers, as viewed from the direction orthogonal to the plane, the common electrode and each of the individual electrodes face with each other to sandwich the piezoelectric layer in the third area, and a length of each of the individual electrodes in the third area outside of one of the pressure chambers is not less than a thickness of a portion of the piezoelectric layer sandwiched by the common electrode and one of the individual electrodes.