Patent ID: 7207659

Claim:
A nozzle arrangement for an inkjet printhead, the nozzle arrangement comprising: a wafer substrate defining an ink passage and incorporating drive circuitry; a passivation layer operatively positioned on the substrate and defining a first aperture of lesser cross sectional area than the ink passage and which is in fluid communication with the ink passage; a nozzle chamber wall extending from the passivation layer; a nozzle chamber roof positioned on the nozzle chamber wall so as to define a nozzle chamber that is in fluid communication with the first aperture, the roof defining an ejection port that is in fluid communication with the nozzle chamber and the wall defining a second aperture; and an actuator anchored to the passivation layer, extending through the second aperture and terminating in a paddle, the actuator being connected to the drive circuitry and being configured so that, upon receipt of a drive signal from the drive circuitry, the actuator displaces the paddle to eject ink through the ejection port.