Liquid Discharge Apparatus and Method for Producing Piezoelectric Actuator

A liquid discharge apparatus configured to discharge liquid, comprising:

• a channel substrate including a plurality of first pressure chambers aligned in a first direction, and a plurality of second pressure chambers aligned in the first direction arranged on one side in a second direction orthogonal to the first direction with respect to the plurality of first pressure chambers;
• a plurality of first individual electrodes arranged to face the first pressure chambers;
• a plurality of second individual electrodes arranged to face the second pressure chambers;
• a piezoelectric layer arranged to cover the plurality of first individual electrodes and the plurality of second individual electrodes in a stacking direction;
• a common electrode arranged to cover the piezoelectric film in the stacking direction and face the plurality of first and second individual electrodes;
• and
• first traces connected to exposed portions of the first individual electrodes exposed from the piezoelectric film and each of which passes from the exposed portion between the two second individual electrodes adjoining in the first direction to extend to the one side in the second direction,
• wherein a cutout, which is cut out from the one side in the second direction so that the cutout is not overlapped with the first trace, is formed between portions of the common electrode facing the two adjoining second individual electrodes;
• and
• the first trace is formed continuously from the exposed portion to an upper surface of the piezoelectric film.