Patent ID: 7466067

Claim:
A liquid transporting apparatus comprising: a channel unit which has a plurality of pressure chambers arranged along a plane, and a piezoelectric actuator which is provided on a surface of the channel unit, which selectively changes volumes of the plurality of pressure chambers, the piezoelectric actuator including: a vibration plate covering the plurality of pressure chambers; a piezoelectric layer which is arranged on a side of the vibration plate opposite to the pressure chambers and which is polarized in a direction of thickness of the piezoelectric layer; a conductive layer arranged entirely over the piezoelectric layer on a side opposite to the vibration plate; a first electrode provided at an area of the piezoelectric layer on a side of the pressure chambers, the area facing the pressure chambers; and second electrodes formed in areas, of the conductive layer, defined by a hole formed in the conductive layer, each of the areas facing one of the pressure chambers; wherein lengths in a predetermined direction of the second electrodes at portions facing the first electrode differ in positive correlation with thicknesses of the piezoelectric layer at first portions each of which is interposed between the first electrode and one of the second electrodes, the first portions displacing to change the volumes of the pressure chambers; and second portions of the piezoelectric layer each of which is not interposed between the first electrode and one of the second electrodes do not displace to change the volumes of the pressure chambers.