Patent ID: 7909436

Claim:
An inkjet head comprising: a base substrate; a plurality of ink chambers formed in the base substrate; and a plurality of drive electrodes formed on side walls of the plurality of ink chambers; wherein the base substrate comprises a first piezoelectric substrate and a second piezoelectric substrate bonded to the first piezoelectric substrate, the first and second piezoelectric substrates having opposite polarization directions in respective thickness directions thereof; wherein the first piezoelectric substrate comprises a plurality of first groove portions formed on one surface of the first piezoelectric substrate, and an ink supply path connected to the plurality of first groove portions and opening toward another surface of the first piezoelectric substrate; wherein the second piezoelectric substrate comprises a plurality of second groove portions which jointly with the plurality of first groove portions of the first piezoelectric substrate form the plurality of ink chambers; and wherein the plurality of drive electrodes comprise first drive electrodes formed on sidewalls of the first groove portions, second drive electrodes formed on sidewalls of the second groove portions, and a plurality of conduction members formed only adjacent to the ink supply path and electrically connecting the respective first and second drive electrodes to one another.