Patent ID: 8016393

Claim:
A method for producing a liquid transport apparatus which transports a liquid and which includes a flow passage unit having a pressure chamber in which an inflow port and a discharge port are formed, and a piezoelectric actuator including: a vibration plate which is joined to the flow passage unit to cover the pressure chamber, the vibration plate having a recess formed on a surface of the vibration plate in an area corresponding to a central portion of the pressure chamber, the surface not facing the pressure chamber; a piezoelectric layer arranged on the vibration plate; and a first electrode which is formed in an area of the piezoelectric layer or the vibration plate, the area not overlapping the central portion of the pressure chamber; and the method comprising: joining the vibration plate and the flow passage unit to each other in a predetermined positional relationship; detecting a positional deviation amount, between the vibration plate and the flow passage unit, in a predetermined direction based on the positional relationship after joining the vibration plate and the flow passage unit; forming the piezoelectric layer by depositing a piezoelectric material on the vibration plate after detecting the positional deviation amount; and forming the first electrode on the piezoelectric layer or the vibration plate in an area overlapping with the pressure chamber such that a length of the first electrode in the predetermined direction is adjusted on the basis of the detected positional deviation amount in the predetermined direction.