PIEZOELECTRIC ELEMENT, LIQUID EJECTING HEAD, AND LIQUID EJECTING APPARATUS

摘要

A piezoelectric element including: a first electrode, a piezoelectric layer formed above the first electrode to have a longitudinal direction and a transverse direction, and a second electrode formed above the piezoelectric layer, wherein at least a part of a side surface of the piezoelectric layer in the transverse direction is a concavo-convex surface, and a width of the piezoelectric layer in the transverse direction from the second electrode to the first electrode changes with the concavo-convex surface.