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Micro-electromechanical fluid ejection mechanism having a shape memory alloy actuator

  • US 7,753,492 B2
  • Filed: 11/27/2008
  • Issued: 07/13/2010
  • Est. Priority Date: 07/15/1997
  • Status: Expired due to Fees
First Claim
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1. A micro-electromechanical fluid ejection mechanism comprising:

  • a substrate defining an ink passage in fluid communication with a tapered ink chamber having an ink ejection port; and

    a shape memory alloy (SMA) actuator arranged within the chamber, the actuator configured to straighten when heated and to return to a bent state upon subsequent cooling to facilitate ejection of ink via the ejection port.

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