| 摘要 |
PROBLEM TO BE SOLVED: To provide an ink-jet recording head having a higher driving efficiency by reducing the flexible deformation constraint of a driving part by an electrode pad part while taking advantage of the high driving efficiency by using a pressure chamber having a planar shape and an aspect ratio substantially equal to one. SOLUTION: This head comprises a plurality of nozzles for ejecting ink droplets, pressure chambers having at least one surface of the wall surface formed as a vibrating plate, communicating with each nozzle, provided independently, actuators each bonded with the vibrating plates, and an ink supply source for supplying an ink to the pressure chambers via a supply path. Each of the pressure chamber has a planer shape and an aspect ration substantially equal to one. The actuators comprise a driving part provided in an area corresponding to the pressure chambers so as to be flexible deformed with the vibrating plates at the time of application of a driving signal, an electrode pad part provided in an area corresponding to the side wall of the pressure chambers for electric connection with a driving signal source, and a bridge part for connecting the driving part and the electrode pad part, with the width size of the bridge part in the connection area part to the driving part is made smaller than the width size of the connection side part of the driving part.
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