Patent ID: 8708464

Claim:
An ink jet head comprising: a nozzle plate including a plurality of nozzles; a piezoelectric element including a plurality of pressure chambers corresponding to the nozzles, and a sidewall that is provided adjacent to the pressure chambers and is formed with a drive element that applies pressure to the pressure chambers to eject a liquid from the nozzles; a substrate to which the piezoelectric element is bonded that has an affinity for the piezoelectric element; a frame member placed on the substrate to surround the piezoelectric element; an electrode that drives the piezoelectric element, wherein the piezoelectric element has a slope that is continuous with an upper edge section of the piezoelectric element, and is not in contact with the nozzle plate, a surface layer of the substrate that has a recess continuous with the slope, and the electrode is formed on the slope and the recess.