Liquid ejecting head and liquid ejecting apparatus

摘要

Piezoelectric elements constituted by lower electrodes, piezoelectric layers, and an upper electrode are extended from positions corresponding to openings of pressure chambers to outer positions beyond opening edges of the pressure chambers. The piezoelectric layers have exposure portions on the extended portions and the exposure portions of the piezoelectric layers are covered by an adhesive between an actuator unit and a sealing plate.

主权项

1. A liquid ejecting head comprising:
a pressure chamber formation member on which a pressure chamber communicating with a nozzle is formed; an actuator unit that includes a piezoelectric element formed by laminating a first electrode, a piezoelectric layer, and a second electrode in this order at a position corresponding to the pressure chamber and is laminated on the pressure chamber formation member; and a sealing member that is bonded to the actuator unit with an adhesive in a state where the piezoelectric element and second electrode are accommodated in an accommodation cavity formed in the sealing member, and the second electrode is a single continuous layer; wherein:
the piezoelectric element is extended from a position corresponding to an opening of the pressure chamber to an outer position beyond an opening edge of the pressure chamber, and the piezoelectric layer includes an exposure portion from which the second electrode is removed on the extended portion;the exposure portion of the piezoelectric layer is covered by the adhesive between the actuator unit and the sealing member; anda bonded surface of the seating member overlaps the second electrode.