Patent ID: 8770726

Claim:
An inkjet head comprising: a substrate; a plurality of piezoelectric members disposed on the substrate; a nozzle plate disposed on the piezoelectric members, the nozzle plate including at least first and second nozzle lines, each of which includes a plurality of nozzles, wherein the nozzles included in the first nozzle line and the nozzles included in the second nozzle line are offset with respect to each other in a direction parallel to each of the nozzle lines; and a plurality of groove parts provided in each of the piezoelectric members, the groove parts corresponding to the nozzles and configured to eject ink through the nozzles, wherein a first groove part which corresponds to a first nozzle and a second groove part which corresponds to a second nozzle closest to the first nozzle is formed by different cutting edges, the groove parts include a first groove group of groove parts formed by one of the cutting edges, the first groove group corresponding to a first nozzle group, and a second groove group of groove parts formed by another of the cutting edges, the second grove group corresponding to a second nozzle group, the nozzles located in an end part of the first nozzle group and the nozzles located in an end part of the second nozzle group are offset with respect to each other in a direction parallel to each of the nozzle lines, and the groove parts extend along straight lines in a direction oblique to a direction in which the piezoelectric members extend.