Patent ID: 6786574
Filing Date: 2004-09-07
Classification: B41J,G06K,G11C,H04N

Abstract:
A micro-electromechanical fluid ejection device that comprisesa substrate that defines a fluid inlet channel and incorporates a wafer and CMOS layers positioned on the wafer; a wall that extends from the substrate and bounds the fluid inlet channel; an elongate actuator that is connected at one end to the CMOS layers, an opposite end of the actuator being displaceable towards and away from the substrate on receipt of an electrical signal from the CMOS layers; and a nozzle that is connected to said opposite end of the actuator, the nozzle having a crown portion and a skirt portion that depends from the crown portion, the crown portion defining a fluid ejection port and the skirt portion being positioned so that the nozzle and the wall define a chamber in fluid communication with the fluid inlet channel and a volume of the fluid chamber is reduced and subsequently enlarged as the nozzle is driven towards and away from the nozzle chamber by the actuator to eject fluid from the fluid ejection port.