| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a piezoelectric actuator unit for liquid ejection head, which has high reliability of electrical connection between a common electrode and a common electrode connection electrode and is less likely to bend; and to provide a liquid ejection head using the same, and a recording apparatus. <P>SOLUTION: The piezoelectric actuator unit for liquid ejection head 21 has a laminate in which a plurality of piezoelectric ceramic layers 21a, b are laminated, a plurality of individual electrodes 35 formed in a first direction and in a direction different from the first direction on one principal surface of the laminate, the common electrode 34 formed inside the laminate, and the common electrode connection electrode 37 formed in a peripheral region of the one principal surface and electrically connected with the common electrode 34. The common electrode connection electrode 37 is connected with the common electrode 34 via a conductor in a through-hole 21c prepared in the piezoelectric ceramic layer 21b. A plane shape of the periphery of the through-hole 21c of the common electrode connection electrode 37 is in a cross shape. <P>COPYRIGHT: (C)2013,JPO&INPIT |
