| 摘要 |
PROBLEM TO BE SOLVED: To improve the strength of a piezoelectric element. SOLUTION: A piezoelectric layer 2 is polarized to a direction in parallel with the face, and electrodes 3 and 4 formed between the layers are arranged so that the electrodes 3 and 4 having one polarity can be positioned so as to be displaced from the electrodes 4 and 3 having the other polarity to the polarized direction. Thus, the electrodes 3 and 4 can be displaced with a direction in parallel with the face of a piezoelectric layer 2 as the maximum displaced direction. Even when any difference is generated in the displacement of the directions of the positive and negative electrodes 3 and 4 in the opposite side and the other side, an inner stress in the direction crossing the boundary face of the piezoelectric layer 2 can be sharply decreased, and the peeling of the piezoelectric layer 2 can be prevented. |
