Patent ID: 7325310

Claim:
A method for manufacturing an ink-jet printhead, the method comprising: preparing a substrate on which a heater and a passivation layer protecting the heater are formed; coating a first photosensitive photoresist on the substrate to form a passage plate; forming an ink chamber corresponding to the heater and an ink passage connected to the ink chamber on the passage plate; burying the ink chamber and the ink passage formed on the passage plate using a second photoresist to form a mold layer; forming a chamber cover layer which covers the ink chamber and the ink passage, on a top surface of the passage plate and the mold layer; forming a plurality of slots corresponding to the ink chamber and/or the ink passage in the chamber cover layer; supplying an etchant to the second photoresist through the slots and removing the second photoresist remaining in the ink chamber and the ink passage; coating a third photoresist to form a nozzle plate on the chamber cover layer; and forming an orifice corresponding to the ink chamber and the nozzle plate.