Patent ID: 6672714
Filing Date: 2004-01-06
Classification: B41J,Y10T

Abstract:
An ink-jet printhead comprising:a pressure chamber forming unit in which pressure chambers for ink storage composed of multiple concave parts on one surface; and a piezoelectric actuator arranged on one surface of said pressure chamber forming unit and for generating pressure in each said pressure chamber selectively; and a vibration layer arranged on said one surface of said pressure chamber forming unit covering each pressure chamber, a lower electrode layer formed of conduction materials laminated on said vibration layer; a first piezoelectric layer laminated on said lower electrode layer, formed of piezoelectric materials polarized in the direction of its thickness having the size to cover multiple said pressure chambers; and an upper electrode layer formed of conduction materials laminated on said first piezoelectric layer, wherein: at least either said upper electrode layer or said lower electrode layer is formed of multiple electrodes separated and formed corresponding to each pressure chamber of the pressure chamber forming unit; wherein said vibration layer comprises a second piezoelectric layer formed of piezoelectric materials laminated under said lower electrode layer.