| 摘要 |
A liquid droplet jet head includes a pressure liquid chamber substrate including nozzles discharging liquid droplets and pressure liquid chambers communicated with the nozzles, a vibration board partially forming wall surfaces of the pressure liquid chambers, and a pressure converter vibrating the vibration board to change pressure in the pressure liquid chambers to discharge the liquid droplets from the nozzles, and including a piezoelectric element having an active region and a inactive region and electrodes disposed to apply an electric force to the active region and not to apply an electric force to the inactive region, and a groove separating the active region from the inactive region formed not so deep as to reach one of the electrodes in a portion in the inactive region facing the vibration board. In the liquid droplet jet head, the pressure liquid chamber substrate is supported by the inactive region of the piezoelectric element. |
