Patent ID: 6869170

Claim:
An ink-jet recording head, comprising: a pressure generating chamber that communicates with a nozzle orifice; and a piezoelectric element having a lower electrode, a piezoelectric layer and an upper electrode being provided in a region corresponding to the pressure generating chamber via a vibration plate, wherein there are provided within a region facing the pressure generating chamber a piezoelectric active portion as a substantial drive portion of the piezoelectric element and a piezoelectric non-active portions having the piezoelectric layer continuous from the piezoelectric active portion but not being substantially driven, the piezoelectric non-active portions being provided on both end portions of the piezoelectric active portion in a longitudinal direction thereof, an electrode wiring drawn out of the upper electrode is provided only on one end portion in the longitudinal direction of the pressure generating chamber, there is provided a protection layer only on the other end portion, wherein the protection layer is provided only in the other end portion, in the longitudinal direction of the pressure generating chamber for protecting the vibration plate being provided in a region facing an end portion of the pressure generating chamber and in region facing an end portion of the piezoelectric layer within the region facing the pressure generating chamber, and the protection layer is provided so as to cover a region facing a corner portion of the pressure generating chamber.