Patent ID: 7913388

Claim:
A manufacturing method of an ink jet print head comprising: a nozzle unit forming step of forming a nozzle unit having a nozzle plate in which a nozzle for discharging ink is disposed; a flow channel unit forming step of forming a plate flow channel unit which is to be bonded to the nozzle unit, has a pressure chamber for communicating with the nozzle, and has a planar dimension in a width direction and depth direction of the plate flow channel unit larger than that of the nozzle unit; an actuator forming step of forming an actuator which is to be bonded at a face of the flow channel unit opposite to a face where the nozzle unit is to be bonded and has a substantially same planar dimension in a width direction and depth direction of the actuator as that of the nozzle unit, for applying pressure to ink in the pressure chamber so as to discharge ink from the nozzle; a bonding step of bonding the nozzle unit formed by the nozzle unit forming step and the actuator formed by the actuator forming step to the flow channel unit formed by the flow channel unit forming step at positions facing each other, respectively, thereby manufacturing the ink jet print head in which the nozzle unit, the flow channel unit and the actuator are laminated; and wherein the bonding step is a step of bonding the nozzle unit and the actuator to the flow channel unit simultaneously, respectively.