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Inkjet printhead having enclosed inkjet actuators

  • US 7,246,884 B2
  • Filed: 05/30/2006
  • Issued: 07/24/2007
  • Est. Priority Date: 07/15/1997
  • Status: Expired due to Fees
First Claim
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1. An inkjet printhead comprising a plurality of ink ejection nozzles, each nozzle comprising:

  • a substrate incorporating circuitry for supplying an electrical current and a channel for supplying ink;

    a chamber on the substrate in fluid communication with the channel;

    an aperture in fluid communication with the chamber;

    a micro-electromechanical actuator on the substrate electrically comprising conductive, thermally expandable material connected to the circuitry so as to be heated on receipt of the electrical current thereby causing displacement of the actuator and ejection of ink from the aperture; and

    an enclosure on the substrate enclosing the micro-electromechanical actuator.

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