| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress vibration of the piezoelectric element, from being blocked by a wire and solder connected to an electrode of the piezoelectric element. <P>SOLUTION: An internal electrode layer 5 consists of a common electrode layer 3 and a power feed electrode layer 6, alternately arranged via a piezoelectric field layer 1, in the laminating direction. A common electrode layer 3 has a common electrode 3a. The power feed electrode layer 6 consists of a first power feed electrode layer 6a and a second power feed electrode layer 6b. The first power feed electrode layer 6 has a pair of mutually conductive first electrodes 2, 2, respectively provided in two regions A2, A4 facing a first diagonal line direction D1, in the main surface of the piezoelectric field layer 1 of four regions A1 to A4, constituted with the main surface of the piezoelectric layer 1 respectively divided into two, in its lengthwise direction L and the shortwise direction S. The second power feed electrode layer 6 has a pair of mutually conductive second electrodes 4, 4 respectively provided in two regions A1, A3 facing a second diagonal line direction D2, in the main surface of the piezoelectric field layer 1 of four regions A1 to A4. The common electrode 3a, the first electrodes 2, 2, the second electrodes 4, 4 are connected to the respective external electrodes 7g, 7b, 7a. <P>COPYRIGHT: (C)2008,JPO&INPIT |
