Patent ID: 6918658
Filing Date: 2005-07-19
Classification: B41J,Y10T

Abstract:
1. A method of producing a liquid jetting head, intended for use in producing a head including: a flowing-path plate through which 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; the flowing-path plate has a substrate layer, an electrocasting layer formed on the other side surface of the substrate layer by electrocasting and a second electrocasting layer formed on the one side surface of the substrate layer by electrocasting; the pressure-chamber space is formed in the electrocasting layer as a through hole having substantially a same shape in a depth direction thereof; the one side surface of the pressure-chamber space is defined by the substrate layer; the other side surface of the pressure-chamber space is defined by the sealing plate; lateral side surfaces of the pressure-chamber space are defined by the electrocasting layer; a second pressure-chamber space is formed in the second electrocasting layer as a through hole having substantially a same shape in a depth direction thereof; the second pressure-chamber space is communicated with the nozzle; the one side surface of the second pressure-chamber space is defined by the nozzle plate; the other side surface of the second pressure-chamber space is defined by the substrate layer; lateral side surfaces of the second pressure-chamber space are defined by the second electrocasting layer; and a communicating hole is formed in the substrate layer for connecting the pressure-chamber space and the second pressure-chamber space; the method comprising: a pattern-forming step of forming and sticking a pattern corresponding to the pressure-chamber space onto the other side surface of the substrate layer, a second pattern-forming step of forming and sticking a second pattern corresponding to the second pressure-chamber space onto the one side surface of the substrate layer, an electrocasting step of forming the electrocasting layer onto the other side surface of the substrate layer by electrocasting in such a manner that the pattern is covered, a second electrocasting step of forming the second electrocasting layer onto the one side surface of the substrate layer by electrocasting in such a manner that the second pattern is covered, a pattern-removing step of removing the pattern in order to form the pressure-chamber space, and a second patted-removing step of removing the second pattern in order to form the second pressure-chamber space.