Patent ID: 8820898
Filing Date: 2014-09-02
Classification: B41J,C04B,H01L

Abstract:
1. A droplet-ejecting head comprising: a pressure chamber communicating with a nozzle hole; and a piezoelectric element that includes a lower electrode, a piezoelectric layer which is formed above the lower electrode and which is made of perovskite-type oxide, and an upper electrode formed above the piezoelectric element, wherein the piezoelectric layer includes a first piezoelectric sub-layer located on a side of the lower electrode and a second piezoelectric sub-layer located between the first piezoelectric sub-layer and the upper electrode, wherein the first piezoelectric sub-layer has a polarization axis predominantly directed in an in-plane direction of the first piezoelectric sub-layer, and the second piezoelectric sub-layer is predominantly (100)-oriented in the pseudocubic coordinate system.