Patent ID: 7114797

Claim:
An actuator device, comprising: a substrate, formed with at least one pressure generating chamber; a vibration plate, joined to the substrate so as to form a part of the at least one pressure generating chamber; a first piezoelectric element, disposed on a part of the vibration plate facing each of the at least one pressure generating chamber, the first piezoelectric element comprising: a first electrode, disposed on the part of the vibration plate; a first piezoelectric layer, laminated on the first electrode; a second electrode, disposed on the first piezoelectric layer; a second piezoelectric layer, laminated on the first piezoelectric layer while covering the second electrode; and a third electrode, disposed on the second piezoelectric layer and electrically connected to the first electrode; and a second piezoelectric element, disposed on the vibration plate and arranged adjacent to the first piezoelectric element, the second piezoelectric element comprising: a fourth electrode, disposed on the vibration plate and electrically connected to the first electrode; a third piezoelectric layer, laminated on the fourth electrode; a fifth electrode, disposed on the third piezoelectric layer; a fourth piezoelectric layer, laminated on the third piezoelectric layer while covering the fifth electrode; and a sixth electrode, disposed on the fourth piezoelectric layer, and electrically isolated from the third electrode and the fourth electrode.