Patent ID: 7334335

Claim:
A method of manufacturing a monolithic ink-jet printhead, the method comprising: forming a sacrificial layer surrounded by sidewalls and a bottom wall on a front surface of a substrate; sequentially stacking a plurality of passivation layers on the front surface of the substrate and forming a heater and a conductor connected to the heater between adjacent layers of the plurality of passivation layers; forming a heat dissipating layer on the plurality of passivation layers and forming a nozzle through which ink is ejected through the plurality of passivation layers and the heat dissipating layer to form a nozzle plate on the front surface of the substrate, the nozzle plate including the plurality of passivation layers and the heat dissipating layer; forming an ink chamber, which is defined by the sidewalls and the bottom wall, by etching the sacrificial layer exposed through the nozzle using the sidewalls and the bottom wall as an etch stop; forming a manifold for supplying ink by etching a rear surface of the substrate; and forming an ink channel by etching the substrate between the manifold and the ink chamber to provide flow communication between the manifold and the ink chamber.