Patent ID: 7351649
Filing Date: 2008-04-01
Classification: B41J,H01L,H05K

Abstract:
1. A method of producing a recording head unit comprising: (A) a recording head including: a plurality of recording elements; and an actuator unit including a plurality of individual electrodes which respectively correspond to the plurality of recording elements; and (B) a printed wiring board which includes conductive leads respectively having terminal portions, which is electrically connected to the plurality of individual electrodes, and through which an operating signal for operating the plurality of recording elements is supplied to the plurality of individual electrodes, the method comprising: forming a plurality of conductive bumps on a surface of the actuator unit such that the plurality of conductive bumps protrude from the surface of the actuator unit, so as to be electrically connected to the plurality of individual electrodes, respectively; coating a surface of the printed wiring board with an uncured synthetic resin to form an uncured synthetic-resin layer covering the conductive leads of the printed wiring board; bringing the plurality of conductive bumps and the terminal portions of the conductive leads into contact with one another by pressing the plurality of conductive bumps onto the uncured synthetic-resin layer such that the plurality of conductive bumps penetrate the uncured synthetic-resin layer; and curing the uncured synthetic-resin layer.