Patent ID: 9682558
Date: 2017-06-20
CPC Classifications: B41J

Claim:
1. A liquid ejection apparatus comprising: a pressure chamber; a diaphragm covering the pressure chamber; a piezoelectric element having a piezoelectric component positioned opposing the pressure chamber; a first electrode disposed on a first side of the piezoelectric component toward the pressure chamber; a second electrode disposed on a second side of the piezoelectric component opposite the first side in an opposed region, the opposed region being a region opposed to the second electrode; and a metal film being absent from at least a portion of the opposed region; wherein a portion of the metal film and a portion of the first electrode are in electrical contact with each other, wherein the portion of the metal film and the portion of the first electrode are between the piezoelectric component and the diaphragm, wherein the piezoelectric component covers the portion of the metal film and the portion of the first electrode, wherein the first electrode is made of platinum and the metal film is made of a metal material other than platinum.