Patent ID: 6762012
Filing Date: 2004-07-13
Classification: B41J,G03F

Abstract:
A method of manufacturing a monolithic ink-jet printhead in which an ink passage which receives ink from an ink reservoir, and a nozzle through which ink is ejected, are monolithically formed on a substrate, the method comprising:forming a heating element which generates bubbles by heating the ink, on a surface of the substrate; coating a negative photoresist to a first thickness on the substrate on which the heating element is formed; first exposing the negative photoresist to light to cure a first portion which forms a sidewall of an ink passage forming wall surrounding an ink chamber and a restrictor, of the negative photoresist using a first photomask in which patterns of the ink chamber and the restrictor of the ink passage are formed; second exposing the negative photoresist to the light to cure a second portion which forms an upper wall of the ink passage forming wall of the negative photoresist to a second thickness using a second photomask in which a pattern of the nozzle is formed; and dissolving and removing an uncured portion of the negative photoresist, which is formed in operations of the first exposing and the second exposing of the negative photoresist, using solvent.