Patent ID: 6340222
Filing Date: 2002-01-22
Classification: B41J,G06K,G11C,H04N

Abstract:
A method of fabricating an ink jet print head, the method including the steps of:depositing a layer of a hydrophobic material on a wafer incorporating drive circuitry and etching the hydrophobic material to define air inlets in the layer of hydrophobic material; forming a plurality of thermal actuators, by deposition and etching techniques, on the layer of hydrophobic material so that each thermal actuator comprises at least a conductive heating portion positioned within hydrophobic material and spaced from the layer of hydrophobic material deposited on the wafer, the thermal actuators being formed so that the air inlets are in fluid communication with a surface of each thermal actuator; and forming a plurality of nozzle chambers on the wafer, by deposition and etching of a sacrificial material so that each thermal actuator is positioned within a nozzle chamber, and so that each nozzle chamber has an ink ejection port.