Piezoelectric element

Abstract

Provided is a piezoelectric element capable of preventing wrinkles from occurring in a piezoelectric element in which a plurality of piezoelectric films are laminated. The piezoelectric element is configured such that a plurality of piezoelectric films, in which a piezoelectric particles in a matrix including a polymer material is sandwiched between electrode layers and a protective layer is laminated on a surface of the electrode layer that is not in contact with the piezoelectric layer, are laminated and the adjacent piezoelectric films are adhered through an adhesive layer. A difference between a maximum height of each piezoelectric film in a thickness direction in a region ranging from an edge surface to 43 μm inside and a height of the piezoelectric film in the thickness direction at a position of 43 μm inside from the edge surface is equal to or less than 4.2 μm.

Dependencies are inferred from the claim text.