公开(公告)号：EP2690679A1

公开(公告)日：2014-01-29

申请号：EP13003012.5

申请日：2013-06-12

申请人： Taiyo Yuden Co., Ltd.

发明人： Shimizu, Hiroyuki ,  Hatano, Keiichi ,  Doshida, Yutaka

IPC分类号： H01L41/187 ,  H01L41/273

CPC分类号： H01L41/187 ,  H01L41/1873 ,  H01L41/273

摘要： A piezoelectric element (10) includes first internal electrodes (12) and second internal electrodes (13, as well as piezoelectric ceramic layers (11) that are made of ceramics and arranged between the first internal electrodes and second internal electrodes. Manganese is present relatively more abundantly in the areas (11b) of the piezoelectric ceramic layers adjacent to the first internal electrodes and second internal electrodes, compared to at the centers of the piezoelectric ceramic layers. Insulation performance of the piezoelectric element is kept from dropping over the course of use.

摘要翻译： 压电元件（10）包括第一内部电极（12）和第二内部电极（13以及由陶瓷制成并且布置在第一内部电极和第二内部电极之间的压电陶瓷层），相对于锰 与压电陶瓷层的中心相比，与第一内部电极和第二内部电极相邻的压电陶瓷层的区域（11b）更加丰富，在使用过程中保持压电元件的绝缘性能下降 。