| 摘要 |
An ink jet head is provided with a passage unit and an actuator unit. The passage unit includes a nozzle and a pressure chamber communicating with the nozzle. The actuator unit includes a piezoelectric layer, a first electrode connected with a front surface of the piezoelectric layer, a second electrode connected with a back surface of the piezoelectric layer, a first insulating layer located between the second electrode and the passage unit, and a first conductive member. The first insulating layer includes a first through hole. At least a part of the first conductive member is located in the first through hole. The passage unit includes a concave portion located at a position facing the first through hole, and a protruding portion which protrudes from an inner surface of the concave portion. One end of the first conductive member is electrically connected with the second electrode. The other end of the first conductive member makes contact with the protruding portion.
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