Patent ID: 7685686

Claim:
A method of producing a piezoelectric actuator, comprising: a first electrode layer forming step of forming, on a substrate, a first electrode layer with a conductive material which starts to sinter at a predetermined temperature; a piezoelectric layer forming step of forming, on the first electrode layer, a piezoelectric layer formed of crystalline particles of a piezoelectric material by blowing aerosol containing the crystalline particles of the piezoelectric material onto the first electrode layer to deposit the crystalline particles of the piezoelectric material on the first electrode layer; an annealing treatment step of subjecting the piezoelectric layer to an annealing treatment; and a second electrode layer forming step of forming, on the piezoelectric layer, a second electrode layer which pairs with the first electrode layer; wherein the predetermined temperature at which the conductive material starts to sinter is not more than an annealing temperature in the annealing treatment step; and a calcination of the first electrode layer is performed simultaneously with the annealing treatment step of the piezoelectric layer.