Patent ID: 7077507
Filing Date: 2006-07-18
Classification: B41J

Abstract:
1. A micro-electromechanical liquid ejection device that comprises a wafer substrate that incorporates drive circuitry and that defines a liquid inlet; a nozzle chamber structure that is positioned on the wafer substrate and defines a nozzle chamber in fluid communication with the liquid inlet and a liquid ejection port in fluid communication with the nozzle chamber; an actuator that is connected to the drive circuitry to be reciprocally displaceable with respect to the substrate on receipt of an electrical signal from the drive circuitry; a liquid displacement member positioned in the nozzle chamber and displaceable to eject liquid from the fluid ejection port; and a sealing structure interconnecting the liquid displacement member and the actuator, the sealing structure and the nozzle chamber structure being configured so that the liquid generates fluidic seals between the nozzle chamber structure and the sealing structure to inhibit the egress of liquid from the nozzle chamber during operation.