Patent ID: 9144972
Filing Date: 2015-09-29
Classification: B41J,C23C,H01L

Abstract:
1. A piezoelectric device comprising: a piezoelectric element including a first electrode, a second electrode, and a piezoelectric layer between the first electrode and the second electrode; a wiring layer connected to one of the first electrode and the second electrode, the wiring layer including an adhesion layer formed so as to overlap with the one of the first electrode and the second electrode and containing at least one of titanium and tungsten, and a conductive layer containing copper and provided on the adhesion layer; a first palladium layer containing palladium and formed on at least a portion of the conductive layer; a nickel layer containing nickel and formed on the first palladium layer; a gold layer containing gold and formed on the nickel layer; and an external wire connected to the gold layer.