Patent ID: 6468437
Filing Date: 2002-10-22
Classification: B41J

Abstract:
A method for producing a liquid discharge head provided with an element substrate and a ceiling plate which are fixed in a mutually opposed state, plural liquid path walls provided between the ceiling plate and the element substrate and defining plural liquid paths, plural discharge energy generating elements provided in parallel manner on the surface of the element substrate so as to be respectively positioned in the plural liquid paths, and plural movable members provided on the element substrate so as to oppose the plural discharge energy generating elements and formed like cantilevers, fixed at their upstream ends in the flowing direction of the liquid in the liquid paths and having free ends at the downstream ends, the method comprising the steps of:forming a gap forming member in a position, on the surface provided with the discharge energy generating element of the element substrate, corresponding to a bubble generating area where a bubble is generated in the liquid by a thermal energy generated by the discharge energy generating element; forming a first material layer to constitute the movable member on the gap forming member; patterning an anti-etching protective film in the form of the movable member; forming a second material layer on the substrate to constitute the liquid path walls so as to cover the upper and lateral faces of the patterned anti-etching protective film; removing a portion of the second material layer by etching, therein forming the liquid path walls and the liquid path; cutting the element substrate to be plurally separated between the step of patterning the movable member and the step of forming the second material layer, wherein the gap forming member exists between the movable member and the substrate during the cutting; and removing the gap forming member after the formation of the liquid path.