| 摘要 |
In a piezoelectric layer of a multilayer piezoelectric element, a portion held between an electrode portion of an individual electrode and a common electrode becomes an active portion. When a voltage is applied between the individual electrode and common electrode, the active portion is displaced. The individual inner electrode includes a connection portion connected to the conductive substance within a through hole of the piezoelectric layer. The connection portion is formed at a position shifted from the longitudinal centerline of the electrode portion. This can restrain the displacement of the electrode portion following the active portion of the piezoelectric layer from being suppressed by the connection with the conductive substance as compared with a case where the connection portion is formed on the centerline of the electrode portion. Therefore, the amount of displacement of the active portion in the piezoelectric layer can be prevented from decreasing.
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