Patent ID: 7874650

Claim:
A piezo-electric type page width inkjet printhead comprising: an intermediate substrate comprising a pressure chamber to be filled with ink to be ejected, a manifold connected to an ink entrance hole to store ink that flows in through the ink entrance hole, a restrictor to connect the manifold to one end of the pressure chamber, and a damper formed through the intermediate substrate corresponding to the other end of the pressure chamber; a lower substrate comprising a nozzle formed through a portion of the lower substrate, which corresponds to the damper, to eject ink; an upper substrate formed on the intermediate substrate to seal an upper side of the pressure chamber; and a piezoelectric actuator formed on the upper substrate to generate a driving power to the pressure chamber to eject the ink through the nozzle, wherein the intermediate substrate comprises a both-sided copper clad laminate plate comprising an upper copper film and a lower copper film that are respectively formed on top and bottom surfaces of the laminate plate.