Patent ID: 8584358

Claim:
A method of manufacturing an inkjet head having head chip to jet ink in each channel from a nozzle by causing shear deformation to a driving wall by applying voltage to a driving electrode, each of the channel being straight with a size and shape substantially unchanged in a longitudinal direction, the method comprising steps of: forming a plurality of driving walls composed of piezoelectric elements and channels alongside alternatively in the head chip; providing outlet ports and inlet ports for the channels respectively on a front surface and a rear surface of the head chip; forming the driving electrodes in the channels to drive the driving walls by applying voltage; providing a nozzle plate at the front surface of the head chip, the nozzle plate having a nozzle at a position corresponding to each channel of the head chip; measuring a channel characteristic of each channel; and weakening shear deformation function of the driving wall from the rear surface of the head chip by processing at least a part of either the driving electrode or the driving wall, based on the measured channel characteristic, and the processing is performed only at the rear surface and the vicinity of the rear surface of the head chip.