Patent ID: 8277031
Filing Date: 2012-10-02
Classification: B41J,H01L

Abstract:
1. A liquid-ejecting head comprising: a flow-passage-forming substrate that includes a pressure-generating chamber, the pressure-generating chamber being in communication with a nozzle through which droplets are ejected; a piezoelectric element disposed on the flow-passage-forming substrate, the piezoelectric element altering the internal pressure of the pressure-generating chamber, wherein: the piezoelectric element includes a piezoelectric layer containing titanium (Ti) and zirconium (Zr), a first electrode, and a second electrode, the first electrode and the second electrode being disposed on the opposite sides of the piezoelectric layer; and an underlying layer configured to establish a tensile stress in the piezoelectric layer, wherein the component ratio Ti/(Zr+Ti) of the piezoelectric layer is 0.40 or more but less than 0.50, and at least a portion of the piezoelectric layer formed on the first electrode contains tetragonal crystals formed by phase transition under the tensile stress caused by the underlying layer.