Patent ID: 6666543
Filing Date: 2003-12-23
Classification: B41J,H04N

Abstract:
A printhead chip for an inkjet printhead, the printhead chip comprisinga substrate; and a plurality of nozzle arrangements that is positioned on the substrate, each nozzle arrangement comprising nozzle chamber walls and a roof that define a nozzle chamber with the roof defining an ink ejection port in fluid communication with the nozzle chamber; an ink-ejecting member that is operatively positioned with respect to the nozzle chamber, the ink-ejecting member being displaceable with respect to the substrate to eject ink from the ink ejection port; an actuator that is connected to the ink-ejecting member, the actuator being displaceable upon receipt of an electrical drive signal to displace the ink-ejecting member and thus eject ink from the ink ejection port; and a covering formation positioned on the substrate so that the substrate and the covering formation define an air chamber, the actuator being positioned within the air chamber.