Patent ID: 6986202
Filing Date: 2006-01-17
Classification: B41J,G06F,G06K,G07F,G11C,H04N,H05K,Y10T

Abstract:
1. A method of fabricating a micro-electromechanical fluid ejection device that comprises the steps of: forming a first layer of a sacrificial material on a substrate incorporating a drive circuitry layer; forming a first electrically conducting layer, a first structural layer and a second electrically conducting layer on the sacrificial material, with the first structural layer interposed between the electrically conducting layers, the sacrificial material being formed so that the first electrically conducting layer defines a heating circuit connected to the drive circuitry, and the electrically conducting layers and the first structural layer define a fluid ejecting member connected to an actuator arm that is displaceable on heating and subsequent expansion of the first electrically conducting layer; forming a second layer of sacrificial material on the second electrically conducting layer; forming a second structural layer on the second layer of sacrificial material, the sacrificial material being formed so that the second structural layer defines a nozzle chamber structure, with the fluid ejecting member positioned in the nozzle chamber structure; and removing the sacrificial material so that the nozzle chamber structure defines a nozzle chamber and a fluid ejection port in fluid communication with the nozzle chamber.