公开(公告)号：EP2141751A4

公开(公告)日：2014-04-02

申请号：EP08711958

申请日：2008-02-26

申请人： DENSO CORP

发明人： SUZUKI SATOSHI ,  MURAI ATSUSHI ,  ASANO HIROAKI ,  NODA KOUJI ,  NAGAYA TOSHIATU ,  IWASE AKIO ,  FUJII AKIRA ,  KADOTANI SHIGE

IPC分类号： H01L41/083 ,  F02M63/00 ,  H01L41/187 ,  H01L41/22 ,  H01L41/27 ,  H01L41/273 ,  H01L41/293 ,  H01L41/297 ,  H01L41/39

CPC分类号： H01L41/0838 ,  F02M63/0026 ,  H01L41/273

摘要： A stacked piezoelectric device 1 including a ceramic laminate formed by laminating piezoelectric ceramic layers and inner electrode layers alternately and a pair of side electrodes. The inner electrode layers 13 and 14 have inner electrode portions 131 and 141 and the recessed portions 132 and 142. The ceramic laminate 15 has the stress absorbing portions 11 and 12. A recessed distance of one of two of the recessed portions 132 and 142 which interleave the stress absorbing portions 11 and 12 therebetween which is located on the same side surface as the stress absorbing portion 11 or 12 is greater than the depth of the stress absorbing portion 11 and 12.