Patent ID: 7625061

Claim:
A printhead integrated circuit (IC) for an inkjet printer, the printhead IC comprising a wafer substrate incorporating drive circuitry; and a plurality of nozzle arrangements located on the drive circuitry, each nozzle arrangement comprising: nozzle chamber structures defining a nozzle chamber and an ink ejection nozzle in fluid communication with said nozzle chamber; an elongate actuator attached to the substrate for displacement towards and away from the substrate in response to actuating signals from the drive circuitry; and an ink ejection member attached to the actuator, the ejection member being positioned for acting on ink within the nozzle chamber to eject a drop of ink from the ink ejection nozzle, wherein each elongate actuator includes an actuator arm of a laminated structure comprising a resiliently flexible inner layer, a conductive layer and a compensation layer, the inner layer being interposed between the conductive and compensation layers.