Ink-jet printer, ink-jet head and method of manufacturing the ink-jet head

摘要

A piezoelectric sheet of an ink-jet head includes dummy individual electrodes in addition to individual electrodes which corresponds to respective nozzles. The dummy individual electrodes are in an outer periphery of the individual electrodes. FPC board applies drive voltage to the individual electrodes in a drive area, and deforms the area in the piezoelectric sheet in the direction of an ink pressure chamber, while the drive voltage is not applied to the individual electrodes of the non-drive area. When the dummy individual electrodes are formed in the non-drive area, a boundary area of the drive area and the non-drive area is uniformly fired when the piezoelectric sheet is manufactured. In the drive area, since surrounding structures of the respective individual electrodes become equal to one another, ink discharge characteristic is substantially uniform in the boundary area of the drive area and the non-drive area.