Patent ID: 8168253

Claim:
A method of manufacturing a piezoelectric actuator, the method comprising: providing a base member including a non-interference portion and a vibration plate including a joining surface which is joined to the base member to cover the non-interference portion, the vibration plate having a stacking surface which is located on a side opposite to the joining surface; forming a recess in the stacking surface of the vibration plate at a position corresponding to the non-interference portion; filling, in the recess of the vibration plate, a low-elasticity material having a modulus of elasticity lower than that of the stacking surface of the vibration plate; forming a piezoelectric layer by blowing aerosol including particles of a piezoelectric material and a carrier gas onto the stacking surface of the vibration plate to deposit the particles of the piezoelectric material on an area, of the stacking surface, different from a surface of the low-elasticity material filled in the recess, such that the piezoelectric layer is not formed in an area facing the recess of the vibration plate; and forming a first electrode arranged on one surface of the piezoelectric layer and a second electrode arranged on the other surface of the piezoelectric layer.