Piezoelectric actuator, liquid discharge head, and recording device

A piezoelectric actuator having a first surface and a second surface that faces away from the first surface and having a plurality of piezoelectric elements at a plurality of positions along the first surface, the piezoelectric actuator comprising:

• a piezoelectric layer that extends along the first surface;
• a common electrode that is provided on the piezoelectric layer at a side adjacent to the first surface and that extends over the plurality of piezoelectric elements;
• a plurality of first individual electrodes that are provided on the piezoelectric layer at a side adjacent to the second surface, opposite the common electrode, that are positioned individually at the plurality of piezoelectric elements, and that are not electrically connected to each other;
• a first insulating layer that is provided on the common electrode at the side adjacent to the first surface, opposite the piezoelectric layer, and that extends over the plurality of piezoelectric elements;
• and
• a plurality of second individual electrodes, each second individual electrode among the plurality of second individual electrodes is provided on the first insulating layer at the side adjacent to the first surface, opposite the common electrode, is positioned individually at the plurality of piezoelectric elements, individually overlaps centers of the plurality of first individual electrodes in a see-through plan view, and is electrically connected to each other.