Piezoelectric liquid ejection device with electrodes formed on partition wall surfaces

A liquid ejection device, comprising:

• a piezoelectric transducer including:
• a plurality of pressure chambers;
• a plurality of partitions each including a piezoelectric material and dividing the plurality of pressure chambers;
• and
• a plurality of electrodes formed in the plurality of pressure chambers, respectively,
• wherein the plurality of partitions each include a first side wall and a second side wall that is positioned on a back surface side of the first side wall,
• wherein the first side wall includes a first wall surface positioned at an upper portion thereof, the first wall surface being positioned so as to be set back from a second wall surface positioned below the first wall surface in a direction normal to the first wall surface,
• wherein a first electrode of the plurality of electrodes is formed on the second wall surface,
• wherein a second electrode of the plurality of electrodes is formed on the second side wall and an upper surface of each of the plurality of partitions, and
• wherein a height of an upper end of the first electrode is the same as a height of an upper end of the second wall surface.