Patent ID: 6447106
Filing Date: 2002-09-10
Classification: B41J,Y10T

Abstract:
An ink jet head comprising:a head main body with a recessed portion for a pressure chamber formed therein, said recessed portion having a supply opening for supplying ink and an emission opening for emitting said ink; and a piezoelectric actuator including a vibration plate blocking up said recessed portion of said head main body so as to form, together with said recessed portion, said pressure chamber, a piezoelectric element provided on a portion of a side of said vibration plate opposite said head main body and corresponding to said pressure chamber, and an electrode, provided at a side of said piezoelectric element opposite said vibration plate, for the application of voltage to said piezoelectric element, wherein, when a voltage is applied, through said electrode, to said piezoelectric element, said portion of said vibration plate corresponding to said pressure chamber undergoes deformation, thereby causing ink in said pressure chamber to be emitted out of said emission opening; wherein said vibration plate of said piezoelectric actuator is formed by laminating together at least two layers having different Young's moduli in the thickness direction of said vibration plate.