Patent ID: 7891065

Claim:
A method of manufacturing a liquid jet head which ejects a liquid, comprising: forming a lower electrode on one surface of a flow passage forming substrate wafer in which a plurality of flow passage forming substrates each provided with pressure generating chambers individually communicating with nozzle openings for ejecting the liquid are integrally formed; forming a piezoelectric layer, in which a plurality of piezoelectric films are laminated by repeatedly performing a step of forming a piezoelectric precursor film comprises holding the flow passage forming substrate wafer on a rotation table rotatably provided within an application chamber and applying an application solution to the lower electrode side of the flow passage forming substrate wafer while allowing the rotation table to rotate the flow passage forming substrate and a step of forming of the piezoelectric film by baking the piezoelectric precursor film; and forming an upper electrode on the piezoelectric layer, wherein in the step of forming the piezoelectric precursor film, the application solution is applied onto each of the flow passage forming substrate wafers to form the piezoelectric precursor films one by one on each of the plurality of flow passage forming substrate wafers constituting a flow passage forming substrate wafer group, and an order of the flow passage forming substrate wafers for starting the application of the application solution to be turned into each of the piezoelectric precursor films is varied by a predetermined number of wafers of the flow passage forming substrate wafer group.