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Ink jet printhead chip having an actuator mechanisms located about ejection ports

  • US 6,966,633 B2
  • Filed: 12/08/2003
  • Issued: 11/22/2005
  • Est. Priority Date: 06/09/1998
  • Status: Expired due to Fees
First Claim
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1. An inkjet printhead chip that comprisesa substrate that defines a plurality of ink supply channels;

  • a drive circuitry layer that is positioned on the substrate; and

    a plurality of nozzle arrangements that are positioned on the substrate, each nozzle arrangement including a nozzle chamber defined by the substrate for holding ink from at least one of the ink supply channels;

    a roof structure positioned over the nozzle chamber, the roof structure defining an ink ejection port; and

    a plurality of actuators positioned in the roof structure about the ink ejection port, each actuator displaceable with respect to the substrate on receipt of an electrical current from the drive circuitry layer to reduce a volume of the nozzle chamber so that ink is ejected from the ink ejection port.

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