Patent ID: 7073891

Claim:
A monolithic ink-jet printhead, comprising: a substrate having an ink chamber to be supplied with ink to be ejected on a front surface thereof, a manifold for supplying ink to the ink chamber on a rear surface thereof, and an ink channel in communication with the ink chamber and the manifold; a nozzle plate including a plurality of passivation layers stacked on the substrate and a heat dissipating layer overlying the plurality of passivation layers, the nozzle plate having a nozzle penetrating the nozzle plate so that ink ejected from the ink chamber is ejected through the nozzle; a heater formed between adjacent passivation layers of the plurality of passivation layers of the nozzle plate and located above the ink chamber for heating the ink to be supplied within the ink chamber; and a conductor provided between adjacent passivation layers of the plurality of passivation layers of the nozzle plate, the conductor being electrically connected to the heater for applying current across the heater, wherein the heat dissipating layer is made of a thermally conductive metal for dissipating heat from the heater.