Patent ID: 6945637

Claim:
A liquid jetting head, comprising: a vibration plate, which forms a part of each of pressure chambers communicated with a nozzle orifice from which a liquid droplet is ejected; a plurality of piezoelectric vibrators, including a drive vibrator and a dummy vibrator which are disposed on the vibration plate such that at least the drive vibrator opposes to each of the pressure chambers, the drive vibrator comprising: a drive electrode; a first piezoelectric layer, laminated on the drive electrode; and a first common electrode, laminated on the first piezoelectric layer, the dummy vibrator comprising: a connection electrode, electrically connected to the first common electrode; a second piezoelectric layer, laminated on the connection electrode; and a second common electrode, laminated on the second piezoelectric layer, and electrically connected to the first common electrode; a first terminal, electrically connected to the drive electrode to supply a drive signal thereto; and a second terminal, electrically connected to the connection electrode to supply a common signal thereto, wherein the drive vibrator is deformed such that the vibration plate is deformed in a direction that the vibration plate, the drive electrode, the first piezoelectric layer and the first common electrode are laminated.