Patent ID: 7396111

Claim:
An inkjet head comprising: a piezoelectric sheet including: an individual electrode-forming region having individual electrodes arranged directly on a front surface of the piezoelectric sheet; inner electrodes formed in inside of the piezoelectric sheet so as to be disposed opposite to said individual electrodes of said individual electrode-forming region; and land portions formed directly on said front surface of the piezoelectric sheet and around said individual electrode-forming region so as to be electrically connected to said inner electrodes through through-holes; and a board including connection terminals electrically connected to said individual electrodes and said land portions respectively, wherein when a drive voltage is applied between said individual electrodes of said piezoelectric sheet and corresponding land portions through said board, ink is ejected from a nozzle corresponding to said individual electrode; said land portions are formed so as to extend lengthwise along outer edges of said individual electrode-forming region; each of said land portions is electrically connected to corresponding connection terminals of said board in such a manner that one end portion of said land portion in the lengthwise direction is connected to said connection terminal; and each of said land portions is electrically connected to corresponding inner electrodes in such a manner that the other end portion of said land portion is connected to corresponding said through-holes formed below said land portion.