| 摘要 |
PROBLEM TO BE SOLVED: To provide a new piezoelectric transducer which can improve discharge characteristics of an ink droplet when a piezoelectric actuator is used, for example, as a piezoelectric ink jet head, since a large buckling distortion does not occur in a region corresponding to a cavity. SOLUTION: The piezoelectric transducer has a thickness T (μm) of a piezoelectric ceramic layer 22 in the piezoelectric actuator 2 and the maximum width W (mm) of a substrate 1 in the cavity 11 of the substrate 1 in a planar direction, set to ranges which satisfy a formula (1): T≥(19.6W+5.5)×10<SP>-3</SP>. COPYRIGHT: (C)2005,JPO&NCIPI
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