Patent ID: 6929355

Claim:
An ink-jet recording head comprising: a passage-forming substrate on which pressure generating chambers communicating with nozzle orifices are defined, and a piezoelectric element composed of a lower electrode, a piezoelectric layer, and an upper electrode, which are provided on the passage-forming substrate while interposing a vibrating plate therebetween, wherein, etching adjustment layers are provided in a region other than the piezoelectric element, where said etching adjustment layers have etching selectivity with the piezoelectric layer and the lower electrode so that the lower electrode is not etched when the piezoelectric layer is etched as well as when a region other than the piezoelectric element is removed, and wherein said etching adjustment layers remain at least on both end portions of the piezoelectric element in a width direction thereof between the piezoelectric layer and the lower electrode constituting the vibration plate when the region other than the piezoelectric element is removed.