Patent ID: 8338195

Claim:
A method for manufacturing a liquid-ejection head having a substrate and a nozzle member, the substrate having a first energy generator and a second energy generator to generate energy for use in ejecting liquid, the nozzle member having a first nozzle and a second nozzle arranged to eject liquid, the first nozzle and the second nozzle opened to correspond in shape and position to the first energy generator and the second energy generator, respectively, and a distance from the first energy generator to the first nozzle is longer than a distance from the second energy generator to the second nozzle, comprising: making the substrate having a first layer, a second layer, and a third layer stacked in this order on the substrate, the second layer more resistant than the third layer to etching by an etching method to be used on the third layer; partially etching the third layer by the etching method to expose the second layer; removing the exposed second layer at least in part to expose a portion of the first layer; and forming the nozzle member by opening the second nozzle through an exposed portion of the first layer, opening the first nozzle through an un-etched portion of the third layer, and removing the portion of the first layer corresponding to the first nozzle.