Patent ID: 7758165
Filing Date: 2010-07-20
Classification: B41J

Abstract:
1. A method of manufacturing an ink-jet printhead, the method comprising: forming a base layer on both surfaces of a substrate; forming a heating element on the base layer to generate heat in response to a current; forming an electrode on the heating element to transmit the current from an external power source to the heating element; forming an insulating layer on the electrode to transfer the heat; forming a thin film shape memory alloy layer on the insulation layer to change between an original state and a deformed state according to a temperature variation corresponding to the heat transferred through the insulating layer; etching the substrate to form a space portion; stacking a photosensitive layer on the thin film shape memory alloy layer, patterning, and etching the photosensitive layer to form a passage plate; forming a nozzle plate in which a nozzle as a path through which ink is ejected is formed; and joining the nozzle plate onto the passage plate to define an ink chamber, wherein the forming of the electrode comprises etching a part of the insulating layer and exposing a part of the electrode so as to connect the electrode to the external power source between the forming of the insulating layer and the forming of the thin film shape memory alloy layer, and wherein the exposing of the part of the electrode is performed after the forming of the thin film shape memory alloy layer.