Patent ID: 6481828
Filing Date: 2002-11-19
Classification: B41J

Abstract:
An ink-jet printhead comprising:a nozzle plate having a nozzle for ejecting ink; a substrate having an ink feed hole for supplying ink from an ink reservoir, the substrate being separated from the nozzle plate by a predetermined distance; and an intermediate layer interposed between the substrate and the nozzle plate, the intermediate layer including an ink chamber connected to the ink feed hole and the nozzle and a heating element surrounding the ink chamber, wherein the heating element includes a first heater for generating heat by the application of current, a second heater for receiving the heat generated by the first heater and boiling ink, which is in the ink chamber, to generate a bubble, and a heat transfer layer in contact with the first and second heaters for transferring the heat generated by the first heater to the second heater.