MICRO-ELECTROMECHANICAL FLUID EJECTION MECHANISM HAVING A SHAPE MEMORY ALLOY ACTUATOR

摘要

Provided is a micro-electromechanical fluid ejection mechanism. The mechanism includes a substrate defining an ink passage in fluid communication with a tapered ink chamber having an ink ejection port, as well as a shape memory alloy (SMA) actuator arranged within the chamber. The actuator is configured to straighten when heated and to return to a bent state upon subsequent cooling to facilitate ejection of ink via the ejection port.