Patent ID: 9340019
Filing Date: 2016-05-17
CPC Classification: B41J,H01L

Claim Text:
1. A piezoelectric device comprising: a pressure chamber formation substrate in which a plurality of spaces is formed in a first direction; and a piezoelectric element that includes a first electrode layer, a piezoelectric layer, and a second electrode layer that are stacked in order on a vibrating plate that covers the pressure chamber formation substrate so as to block the plurality of spaces, wherein: the first electrode layer is provided independently for each pressure chamber and the second electrode layer is provided continuously for the plurality of the pressure chambers, the first electrode layer is formed to have a width in the first direction that is narrower than a width of the pressure chamber in the first direction at an area corresponding to the pressure chamber, the vibrating plate, at the area corresponding to the pressure chamber, includes an area P the area P when a thickness of the vibrating plate at the area P