| 摘要 |
PROBLEM TO BE SOLVED: To provide a liquid jet head which inhibits destruction of a piezoelectric actuator and a manufacturing method of the liquid jet head, and to provide a liquid jet device.SOLUTION: A liquid jet head includes: a passage formation substrate 10 provided with a pressure generating chamber 12; a diaphragm 50 provided at one surface side of the passage formation substrate 10; and a piezoelectric actuator 300 in which a first electrode 60, a piezoelectric layer 70, and a second electrode 80 are laminated from the diaphragm 50 side at the side of the diaphragm 50 which is opposite to the pressure generating chamber 12. In the piezoelectric actuator 300, the second electrode 80 is provided so as to continue over multiple active parts 310 and functions as a common electrode of the active parts 310. The second electrode 80 includes: a first layer 81 located at the piezoelectric layer 70 side; and a second layer 82 located at the opposite side of the piezoelectric layer 70. In the second layer 82, an end part is formed on the first layer 81 and an insulation layer 200 is provided at a position which is located between the first layer 81 and the second layer 82 and overlaps with at least an end part of the second layer 82. |
