Patent ID: 7896468

Claim:
An ink ejection nozzle arrangement for an inkjet printhead, the ink ejection nozzle arrangement comprising: a nozzle chamber structure defining a nozzle chamber, the nozzle chamber having a nozzle defined in a roof of the nozzle chamber; an anchor extending from the wafer assembly in a location; an elongate arm attached to a post positioned external to the nozzle chamber, the elongate arm extending from the post and into the nozzle chamber, the elongate arm terminating in a free end within the nozzle chamber; and a pair of layers of conductive material located on either side of the elongate arm, one of the layers being connected to a current supply so that, upon receipt of the current supply, differential thermal expansion between the pair of layers cause the free end of the elongate arm to deflect, thereby ejecting ink in the nozzle chamber through the nozzle.