Patent ID: 6836940

Claim:
A process for producing a laminated ink-jet recording head comprising a spacer in which a pressure generating chamber is formed, a diaphragm that closes one side of said pressure generating chamber and which has a piezoelectric vibrator of a flexural vibrating mode secured to the surface, and a nozzle plate that closes the other side of said pressure generating chamber and which has a nozzle orifice bored for the issuance of ink drops, said process comprising: forming an insulation layer to define openings located in one or more regions of said diaphragm that correspond to the pressure generating chamber; forming a titanium layer in at least one of the regions where the openings are located; forming a layer of a piezoelectric material in a film thickness of not less than 1 μm but not more than 10 μm on said titanium layer by a hydrothermal method; and forming an electrode on the surface of said layer of a piezoelectric material.