Patent ID: 7469994

Claim:
An ink-jet head comprising: a flexible printed circuit having an electrode-formed face on which a constant-potential-signal electrode and a plurality of drive-signal electrodes are formed, the constant-potential-signal electrode being connected to a constant-potential-signal wiring, and each of the drive-signal electrodes being connected to a drive-signal wiring a head main body having a plurality of nozzles that eject ink, a plurality of pressure chambers that respectively communicate with the nozzles and are arranged adjacent to one another, and an energy applier that applies ejection energy to ink in the pressure chambers on the basis of a drive signal; and a covering member formed on the flexible printed circuit board, wherein the covering member is configured to cover a first portion of the electrode-formed face and to expose each of the plurality of drive-signal electrodes and the constant-potential signal electrode, wherein: the energy applier has a terminal-formed face on which a plurality of drive-signal terminals and a constant-potential-signal terminal are formed, each of the drive-signal terminals is supplied with a drive signal, and the constant-potential-signal terminal is supplied with a constant-potential signal; the constant-potential-signal terminal is bonded to the constant-potential signal electrode with a metal bond, and the drive-signal terminals are respectively bonded to the drive-signal electrodes with a metal bond; the covering member is further configured to not cover a second portion of the electrode-formed face, the second portion of the electrode-formed face being located between the plurality of drive-signal electrodes and the constant-potential-signal electrode; and the ink-jet head further comprises a reinforcement that is located between the drive-signal terminals arranged adjacent to one another and the constant-potential-signal terminal and is in contact with and interposed between the terminal-formed face and the second portion of the electrode-formed face so that the terminal-formed face and the electrode-formed face are spaced apart from each other.