Piezoelectric actuator, liquid jetting head incorporating the same, and method of manufacturing the actuator and head

摘要

A first common electrode to be fixed at a predetermined potential is formed on a vibration plate. The first common electrode has a first proximal portion and first branch portions extended from the proximal portion. A first piezoelectric layer is laminated on each of the first branch portions. A drive electrode is laminated on each first piezoelectric layer. A second piezoelectric layer is laminated on each drive electrode. A second common electrode to be fixed at the predetermined potential has a second proximal portion and second branch portions extended from the proximal portion such that each of the second branch portions is laminated on each second piezoelectric layer. A conduction member electrically connects the first proximal portion and the second proximal portion.