Liquid discharge head

A liquid discharge head comprising:

• a piezoelectric body including a plurality of stacked piezoelectric layers,
• the piezoelectric body including:
• a first end and a second end separated in a first direction orthogonal to a stacking direction of the plurality of stacked piezoelectric layers;
• a plurality of individual electrodes located at a first plane orthogonal to the stacking direction;
• and
• a first common electrode located at a second plane which is orthogonal to the stacking direction and different in position in the stacking direction from the first plane,
• wherein the plurality of individual electrodes form a plurality of individual electrode arrays arranged at intervals between the first end and the second end,
• wherein the plurality of individual electrode arrays include a first individual electrode array, a second individual electrode array arranged adjacent to the first individual electrode array in the first direction, a third individual electrode array arranged adjacent to the second individual electrode array in the first direction, and a fourth individual electrode array arranged adjacent to the third individual electrode array in the first direction,
• wherein the first individual electrode array is positioned between the first end and the second individual electrode array in the first direction, the second individual electrode array is positioned between the first individual electrode array and the third individual electrode array in the first direction, and the third individual electrode array is positioned between the second individual electrode array and the fourth individual electrode array in the first direction,
• wherein the plurality of individual electrodes forming the first individual electrode array are arranged in a second direction being orthogonal to the stacking direction and intersecting the first direction, the plurality of individual electrodes forming the second individual electrode array are arranged in the second direction, the plurality of individual electrodes forming the third individual electrode array are arranged in the second direction, and the plurality of individual electrodes forming the fourth individual electrode array are arranged in the second direction,
• wherein the first common electrode includes a first extending portion extending in the second direction to pass between the first individual electrode array and the second individual electrode array in the first direction, a second extending portion extending in the second direction to pass between the third individual electrode array and the fourth individual electrode array in the first direction, a plurality of first projecting portions projecting from the first extending portion toward the second end, and a plurality of second projecting portions projecting from the second extending portion toward the first end,
• wherein each of the first projecting portions overlaps partially with one of the plurality of individual electrodes forming the second individual electrode array in the stacking direction, and each of the second projecting portions overlaps partially with one of the plurality of individual electrodes forming the third individual electrode array in the stacking direction, and
• wherein the liquid discharge head further comprises a plurality of conductor layers located on the second plane between the plurality of first projecting portions and the plurality of second projecting portions in the first direction, the plurality of conductive layers being electrically separated from the first common electrode, and the plurality of conductive layers being electrically separated from each other.