Patent ID: 8215017

Claim:
A method of manufacturing a liquid ejection head having: a plurality of passage modules, each passage module including a plurality of individual passages, each individual passage leading through a pressure chamber to a liquid ejection port that ejects a liquid; a plurality of actuator modules, each actuator module including a plurality of actuators respectively applying pressure to the liquid in the plurality of pressure chambers in each passage module; and a drive unit, which is thermally coupled to the passage modules and which supplies a drive voltage to the actuator modules corresponding to the passage modules; the method of manufacturing a liquid ejection head comprising: ranking the passage modules based on a magnitude of a passage resistance of the individual passages of the respective passage modules; ranking the actuator modules based on a magnitude of a capacitance of the actuators of the respective actuator modules; and fixing the actuator modules to the passage modules so that the actuator modules that were ranked in the actuator module ranking as actuator modules in which the actuators have a capacitance not less than a predetermined capacitance correspond to the passage modules that were ranked in the passage module ranking as passage modules in which the individual passages have a passage resistance not less than a predetermined passage resistance, and so that the actuator modules that were ranked in the actuator module ranking as actuator modules in which the actuators have a capacitance less than the predetermined capacitance correspond to the passage modules that were ranked in the passage module ranking as passage modules in which the individual passages have a passage resistance less than the predetermined passage resistance.