Patent ID: 8474138

Claim:
A method of manufacturing an ink-jet head, comprising: preparing a piezoelectric material comprising an internal electrode in the form of a sheet; forming a plurality of individual electrodes at equal intervals in a drive area and an area outside of the drive area on a surface of the piezoelectric material; forming a piezoelectric sheet which comprises the plurality of individual electrodes and the internal electrode opposite to the respective individual electrodes by firing the piezoelectric material in which the individual electrodes are formed; forming a plurality of individual electrodes for drive voltage application on a board which drives the piezoelectric sheet; and electrically connecting the respective individual electrodes in the drive area of the piezoelectric sheet to the respective individual electrodes formed on the board, wherein the plural individual electrodes in the area outside of the drive area of the piezoelectric material remain unconnected to any of the individual electrodes for drive voltage application until the method of manufacturing the ink-jet head is completed.