Patent ID: 7207662

Claim:
An ink-jet printhead, comprising: a substrate having an ink chamber to be filled with ink to be ejected formed in an upper portion thereof and a manifold for supplying ink to the ink chamber formed in a lower portion thereof; a nozzle plate formed on the substrate, the nozzle plate including a plurality of passivation layers formed of an insulating material, a heat dissipation layer formed on the plurality of passivation layers and made of a thermally conductive material, and a nozzle passing through the nozzle plate and in flow communication with the ink chamber; and a first and a second heater and a first and a second conductor, each of which are interposed between adjacent layers of the plurality of passivation layers of the nozzle plate, the first and second heaters being disposed on the ink chamber and for heating ink stored in the ink chamber, the first and second conductors for conducting a current to the first and second heaters, wherein a material layer is interposed between the ink chamber and the manifold to form a bottom wall of the ink chamber and a top wall of the manifold, and a plurality of ink channels is formed in the material layer to provide flow communication between the ink chamber and the manifold.