Patent ID: 6910272

Claim:
A method of manufacturing an ink jet recording head including a passage forming substrate made of a silicon monocrystalline substrate having a pressure generating chamber communicating with a nozzle orifice, a vibration plate provided on a surface of the passage forming substrate, a piezoelectric element provided on the vibration plate having a lower electrode film, a piezoelectric layer and an upper electrode, which are formed by film forming and lithography processes, the method comprising: forming a groove on both sides of a region in one surface of the passage forming substrate where the pressure generating chamber is to be formed, the grooves extending in the longitudinal direction; forming an etching stop layer in the groove for restricting etching of the passage forming substrate; forming the piezoelectric element by successively laminating the lower electrode, the piezoelectric layer and the upper electrode on the surface of the passage forming substrate through a vibration plate interposed therebetween; and forming the pressure generating chamber by etching out the side of the vibration plate in the passage forming substrate by an etching process so that the etching stop layer is exposed.