| 摘要 |
PROBLEM TO BE SOLVED: To provide a liquid ejection head that reduces stress concentration of piezoelectric elements and can suppress breakage of the piezoelectric elements, and further to provide a liquid ejection device.SOLUTION: A liquid ejection head comprises: a flow path formation substrate 10 on which pressure generating chambers 12 communicating with nozzle openings are arranged side by side in a short side direction; and piezoelectric elements 300 that are provided corresponding to the pressure generating chambers 12 at one surface side of the flow path formation substrate 10 and have first electrodes 60, piezoelectric layers 70 provided on the first electrodes 60 and second electrodes 80 provided on the piezoelectric layers 70. The second electrodes 80 are continuously provided in a direction in which the pressure generating chambers 12 are arranged side by side while the first electrodes 60 are being independently provided corresponding to the pressure generating chambers 12. In a direction intersecting with the direction in which the pressure generating chambers 12 are arranged side by side, low dielectric layers 200 having permittivity lower than those of central portions of active portions 320 are provided among the first electrodes 60 and the second electrodes 80 at active portion sides of at least one boundaries of the boundaries among the active portions 320 for substantively driving the piezoelectric layers 70 and non-active portions 330 for not substantively driving the piezoelectric layers 70. |
