Patent ID: 6871400

Claim:
A method of producing a liquid jetting head, including: a flowing-path plate having a through hole where a flowing-path space is formed as a flowing-path for a liquid; a nozzle plate provided on one side surface of the flowing-path plate, said nozzle plate having a nozzle that is communicated with the flowing-path space; and a sealing plate provided on the other side surface of the flowing-path plate for sealing the flowing-path space; wherein: a portion of the other side of the flowing-path space forms a pressure-chamber space; a portion of the other side of the flowing-path plate including at least a portion of the pressure-chamber space is formed by electrocasting; a pressure-generating unit is provided at a portion of the other side of the sealing plate corresponding to the pressure-chamber space for changing a pressure of the liquid in the pressure-chamber space; and the flowing-path plate has a substrate layer and an electrocasting layer formed on the other side surface of the substrate layer by electrocasting; the method comprising: a pattern-forming step of forming and sticking a pattern corresponding to a portion of the flowing-path space in the portion of the other side of the flowing-path plate onto the other side surface of the substrate layer, an electrocasting step of forming the portion of the other side of the flowing-path plate onto the other side surface of the substrate layer by electrocasting in such a manner that the pattern is covered, and a pattern-removing step of removing the pattern in order to form the portion of the flowing-path space in the portion of the other side of the flowing-path plate.