Abstract: An inkjet printhead and a method of driving the inkjet printhead include a flow channel substrate having a pressure chamber, and a piezoelectric actuator formed on the flow channel substrate to apply a driving force to the pressure chamber to eject ink. The piezoelectric actuator includes a piezoelectric layer formed on the flow channel substrate to correspond to the pressure chamber, and a plurality of common electrodes and a plurality of driving electrodes alternately arranged in a length direction of the piezoelectric layer.

Abstract: An inkjet printhead and a method of driving the inkjet printhead include a flow channel substrate having a pressure chamber, and a piezoelectric actuator formed on the flow channel substrate to apply a driving force to the pressure chamber to eject ink. The piezoelectric actuator includes a piezoelectric layer formed on the flow channel substrate to correspond to the pressure chamber, and a plurality of common electrodes and a plurality of driving electrodes alternately arranged in a length direction of the piezoelectric layer.

Abstract: The present invention relates to an aminomethyl polystyrene resin wherein aminomethyl group is grafted only on the surface of polystyrene resin, and a preparation process for the same. More particularly, the present invention is directed to a process for preparing aminomethyl polystyrene resin wherein aminomethyl group is grafted only on the surface of polystyrene resin, which comprises a step for grafting amidomethyl group to surface of polystyrene resin and a step for hydrolysis of the amidomethyl group grafted on the surface of polystyrene resin.