Patent ID: 7861386

Claim:
A method for manufacturing a piezoelectric actuator provided with a substrate and a piezoelectric film formed on the substrate, the method comprising the steps of: forming the piezoelectric film by blowing an aerosol containing particles of a piezoelectric material on a surface of the substrate to adhere the particles to the substrate; and annealing the piezoelectric film, wherein the step of annealing includes a first annealing step and a second annealing step conducted after the first annealing step and having an annealing temperature lower and an annealing time longer than those of the first annealing step, wherein the piezoelectric film is substantially formed before the step of annealing, and wherein a treatment atmosphere in which the substrate is disposed for conducting the first annealing step is not required to be different from a treatment atmosphere in which the substrate is disposed for conducting the second annealing step.