Patent ID: 6840600
Filing Date: 2005-01-11
Classification: B41J,G06F,G06K,G11C,H04N

Abstract:
1. A micro-electromechanical fluid ejection device that comprises a substrate that incorporates drive circuitry; nozzle chamber walls and a roof that are positioned on the substrate to define a nozzle chamber with the roof defining a fluid ejection port in fluid communication with the nozzle chamber; a fluid-ejecting member that is operatively positioned with respect to the nozzle chamber, the fluid-ejecting member being displaceable with respect to the substrate to eject fluid from the fluid ejection port; an actuator that is connected to the fluid-ejecting member and to the drive circuitry, the actuator being displaceable upon receipt of an electrical signal from the drive circuitry to displace the fluid-ejecting member and thus eject fluid from the fluid ejection port; and a covering formation that is positioned on the substrate so that the substrate and the covering formation define an air chamber, the actuator being positioned within the air chamber.