Patent ID: 9581810
Date: 2017-02-28
CPC Classifications: G02B,H01L

Claim:
1. A piezoelectric actuator, comprising: a plurality of piezoelectric layers; a plurality of electrodes between which each of the piezoelectric layers is placed so that the electrodes and the piezoelectric layers alternate with each other; and a substrate on which the plurality of piezoelectric layers and the plurality of electrodes are formed, wherein the plurality of piezoelectric layers include a first piezoelectric layer and a second piezoelectric layer, wherein the plurality of electrodes include: the piezoelectric actuator further comprising: a first connection-purpose electrode disposed in a contact hole on an upper surface of the substrate; a second connection-purpose electrode disposed in a contact hole on an upper surface of the lower electrode; a third connection-purpose electrode disposed in a contact hole on an upper surface of the upper electrode; and a wire disposed on, and extending along, the upper surface of the substrate, on a lateral face of the first piezoelectric layer, and on a lateral face of the second piezoelectric layer, wherein the first-connection-purpose electrode, the second connection-purpose electrode, and the third connection-purpose electrode are electrically coupled to each other to be set to the same potential through the wire.