| 摘要 |
PROBLEM TO BE SOLVED: To provide a liquid ejection head which can prevent breakdown of a piezoelectric element by reducing stress concentration thereof, and a liquid ejection apparatus. SOLUTION: The liquid ejection head includes a channel forming substrate 10 in which pressure generating chambers 12 communicating with nozzle openings are juxtaposed in the transverse direction, and piezoelectric elements 300 provided on one surface side of the channel forming substrate 10 correspondingly to the pressure generating chambers 12 and having a first electrode 60, a piezoelectric layer 70 and a second electrode 80, respectively, wherein the first electrodes 60 are provided correspondingly to the pressure generating chambers 12 and independently therefrom, the second electrodes 80 are provided continuously in the juxtaposing direction of the pressure generating chambers 12, and a low dielectric layer 200 having a dielectric constant lower than that in the central part of an active portion 320 is provided between the first electrode 60 and the second electrode 80 on the active portion 320 side of at least one of the border with a substantially driving active portion 320 or the border with a substantially non-driving active portion 330 of the piezoelectric layer 70 in the direction intersecting with the juxtaposing direction of the pressure generating chambers 12. COPYRIGHT: (C)2011,JPO&INPIT |
