Patent ID: 7634855

Claim:
A producing method for an ink jet recording head including pressure generation chambers respectively communicating with discharge ports for discharging liquid, piezoelectric elements respectively provided corresponding to the pressure generation chambers, and a vibration plate commonly provided between the pressure generation chambers and the piezoelectric elements, the method comprising: a providing step of providing a flat-shaped substrate; a recess forming step of forming recesses in a main surface of the substrate by etching the main surface of the substrate; a piezoelectric element forming step of forming the piezoelectric elements in the recesses, by depositing successive layers in the recesses so as to form the main surface of the substrate and the piezoelectric elements to be flat; a vibration plate forming step of forming the vibration plate on the main surface of the substrate and the piezoelectric elements so as to form the vibration plate to be flat; a pressure generation chamber forming step of forming the pressure generation chambers on the vibration plate; and a removing step of removing portions of the substrate in peripheral portions of the piezoelectric elements to form spaces surrounding the piezoelectric elements in the substrate.