Patent ID: 6692112
Filing Date: 2004-02-17
Classification: B41J,Y10T

Abstract:
A monolithic ink-jet printhead, comprising:a substrate on which a manifold for supplying ink, an ink chamber filled with ink to be ejected, the ink chamber having a hemispheric shape, and an ink channel for supplying ink to the ink chamber from the manifold are formed monolithically; a silicon oxide layer in which a nozzle for ejecting ink is formed in a position corresponding to a center of the ink chamber, the silicon oxide layer being deposited on the substrate; a heater formed on the silicon oxide layer to surround the nozzle; and a MOS integrated circuit mounted on the substrate to drive the heater, the MOS integrated circuit including a MOSFET and electrodes connected to the heater, wherein the MOSFET includes a gate formed on a gate oxide layer using the silicon oxide layer as the gate oxide layer, and source and drain regions formed under the silicon oxide layer, and wherein the silicon oxide layer, the heater, and the MOS integrated circuit are formed monolithically on the substrate.