Patent ID: 8430483

Claim:
A liquid discharge device, comprising: a flow channel unit having a plurality of nozzles for discharging liquid and a plurality of pressure chambers individually communicated with the plurality of individual nozzles; a drive unit having a plurality of drive parts for individually applying a discharge pressure to the liquid in the plurality of pressure chambers and a plurality of electrodes in correspondence to the plurality of drive parts in which a drive voltage is applied to each of the plurality of electrodes to selectively drive the plurality of drive parts; a wiring board having a board main body, a plurality of terminals formed on a surface of the board main body, and an insulating covering material for covering the plurality of terminals; and a plurality of protruding bumps each having conductivity which are disposed on the surface of the drive unit, communicated with the corresponding electrodes, and extended through the insulating covering material to be electrically connected to the corresponding terminals; wherein the insulating covering material is uncured when the plurality of bumps are extended therethrough, and is cured thereafter, and when a point which is positioned on an outer circumferential surface of a base end portion of one of the bumps, and is closest to one of the drive parts is assumed to be a closest point, and a point which is positioned on the outer circumferential surface of the base end portion of the bump, and is most distant from the drive part is assumed to be a most distant point, a close region including the closest point on the surface of each of the plurality of bumps is processed such that the uncured insulating covering material is less likely to flow in the close region than in a distant region including the most distant point on the surface of each of the plurality of bumps.