Patent ID: 8714709
Filing Date: 2014-05-06
Classification: B41J

Abstract:
1. An inkjet printhead comprising; a plurality of sets each of which includes a nozzle to eject ink, a pressure chamber communicating with the nozzle, and an actuator to apply force to elect the ink in the pressure chamber through the nozzle, wherein the sets are two-dimensionally arrayed; a circuit board including: a connection member to connect the wires to a driving unit, the connection member being provided outside of an array area, the array area being an area where all of the sets of the inkjet printhead are two-dimensionally arrayed, wherein the nozzles are arranged linearly to form nozzle rows, and the number of the nozzles in each of the nozzle rows is M, wherein M is an integer of 2 or more; wherein the number of the nozzle rows is N, wherein N is an integer of 2 or more; wherein the through hole via corresponding to each of the nozzles of n nozzle row of the N nozzle rows is provided inside of the array area, wherein n is any integer satisfying 1≦n<N; and wherein the through hole via corresponding to each of the nozzles of the N nozzle rows except the a nozzle row is provided outside of the array area, and