Patent ID: 7677707

Claim:
A piezoelectric inkjet head comprising: a flow channel plate having a plurality of pressure chambers; a vibration plate bonded to a top surface of the flow channel plate to cover the pressure chambers; an insulating layer formed on a top surface of the vibration plate; a nozzle plate having a plurality of nozzles corresponding to the pressure chambers, bonded to a bottom surface of the flow channel plate; and a plurality of piezoelectric actuators bonded to a top surface of the insulating layer to provide ink-ejecting forces to the respective pressure chambers by deforming the vibration plate; wherein a top surface of the insulating layer or a top surface of the vibration plate has a plurality of guide grooves of a predetermined depth and width, and the plurality of guide grooves are disposed in positions corresponding to the plurality of pressure chambers and the plurality of piezoelectric actuators formed inside each of the plurality of guide grooves.