Patent ID: 7226148

Claim:
An ink-jet printhead, comprising: a substrate, an ink chamber to be filled with ink to be ejected formed on an upper surface of the substrate, a manifold for supplying ink to the ink chamber formed on a lower surface of the substrate, and an ink channel formed between the ink chamber and the manifold to provide flow communication between the ink chamber and the manifold; a substantially flat nozzle plate formed on the upper surface of the substrate, the nozzle plate including a plurality of passivation layers, a heat dissipation layer disposed on the plurality of passivation layers, the heat dissipation layer formed of a thermally conductive material and including a first thermally conductive layer formed on the plurality of passivation layers and a second thermally conductive layer formed on the first thermally conductive layer, and a nozzle extending through the nozzle plate in flow communication with the ink chamber; and a heater and a conductor, each of which is interposed between adjacent passivation layers of the nozzle plate, the heater heating ink filled in the ink chamber and the conductor applying current to the heater.