Patent ID: 7237878
Filing Date: 2007-07-03
Classification: B41J

Abstract:
1. A liquid jetting head, comprising: a vibration plate, which forms a part of a pressure chamber communicated with a nozzle orifice from which a liquid droplet is ejected, the pressure chamber being defined by first edges extending in a first direction with a first dimension and second edges extending in a second direction substantially perpendicular to the first direction with a second dimension shorter than the first dimension; a piezoelectric vibrator, disposed on the vibration plate so to oppose the pressure chamber in a third direction which is orthogonal to the first direction and the second direction, the piezoelectric vibrator comprising: a drive electrode, disposed so as to oppose the pressure chamber in the third direction, while extending beyond a line opposing one of the second edges in the third direction; a first piezoelectric layer, disposed so as to oppose the drive electrode in the third direction while extending beyond lines opposing the second edges in the third direction; a first common electrode, disposed on an upper face of the first piezoelectric layer so as to oppose the drive electrode through the first piezoelectric layer in the third direction; and a drive terminal, electrically connected to the drive electrode to supply a drive signal thereto, wherein an end of the drive terminal is disposed on the upper face of the first piezoelectric layer so as to oppose the drive electrode through the first piezoelectric layer in the third direction, while being separated from the first common electrode.