公开(公告)号：US11189777B2

公开(公告)日：2021-11-30

申请号：US16128887

申请日：2018-09-12

Applicant: TDK CORPORATION

Inventor： Yoshiki Ohta ,  Tetsuyuki Taniguchi ,  Hideya Sakamoto ,  Kazushi Tachimoto ,  Junpei Kikuchi ,  Akihiro Takeda

IPC: H01L41/08 ,  H01L41/083 ,  H01L41/277 ,  H01L41/09 ,  H01L41/047 ,  H01L41/053

Abstract: A multilayer piezoelectric element includes a piezoelectric element body, a first internal electrode and a second internal electrode, a plurality of first connecting conductors, a plurality of second connecting conductors, and an external member. The piezoelectric element body is formed by laminating a plurality of piezoelectric element body layer. The piezoelectric element body includes a first main surface and a second main surface, and a side surface. The plurality of first connecting conductors are connected to the first internal electrode. The plurality of second connecting conductors are connected to the second internal electrode. The external member is conductive and is bonded to the first main surface in such a way as to cover the first end portions of the plurality of first connecting conductors. The external member is electrically connected to the plurality of first connecting conductors.