公开(公告)号：US20220352454A1

公开(公告)日：2022-11-03

申请号：US17615574

申请日：2020-05-25

Applicant: TDK CORPORATION

Inventor： Yoshiki OHTA ,  Jun SUGAWARA ,  Kenichiro ANDOU ,  Nana SATO ,  Akihiro TAKEDA

IPC: H01L41/047 ,  H01L41/113 ,  H01L41/257

Abstract: A piezoelectric element includes a piezoelectric body including a piezoelectric material, and a first electrode and a second electrode provided on the piezoelectric body. The piezoelectric body includes a base and a plurality of drivers. The base includes a first main surface and a second main surface opposing each other. The plurality of drivers is arranged on the first main surface in such a way as to be separate from each other. Each of the plurality of drivers includes a third main surface contacting the first main surface and a fourth main surface opposing the third main surface. The base includes a plurality of first regions in which the plurality of drivers is provided and a second region provided between the first regions adjacent to each other. The base is curved.

公开(公告)号：US20150340589A1

公开(公告)日：2015-11-26

申请号：US14720062

申请日：2015-05-22

Applicant: TDK Corporation

Inventor： Yasuyuki SATOH ,  Keisuke ITAKURA ,  Jun SUGAWARA

IPC: H01L41/083 ,  H01L41/047

CPC classification number: H01L41/0836 ,  H01L41/0471 ,  H01L41/083

Abstract: A multilayer piezoelectric device comprises a multilayer body and first and second outer electrodes. The multilayer body has base, first and second driving parts, and non-driving part. The driving parts and non-driving part extend from the base along stacking direction. The first driving part is closer to the non-driving part than the second driving part. Each driving part has first and second inner electrodes opposing each other in stacking direction. The base has a third inner electrode extending along a plane orthogonal to the stacking direction. The first outer electrode is connected to the first inner electrode. The second outer electrode is connected to the second and third inner electrodes. In the stacking direction, the overlap area of the third and second inner electrode of the first driving part is greater than the overlap area of the third and second inner electrode of the second driving part.

Abstract translation: 一种多层压电器件包括多层体和第一和第二外电极。 多层体具有基部，第一和第二驱动部以及非驱动部。 驱动部件和非驱动部件从底座沿堆叠方向延伸。 第一驱动部比第二驱动部更靠近非驱动部。 每个驱动部分具有在堆叠方向上彼此相对的第一和第二内部电极。 底座具有沿垂直于层叠方向的平面延伸的第三内电极。 第一外部电极连接到第一内部电极。 第二外部电极连接到第二和第三内部电极。 在堆叠方向上，第一驱动部的第三和第二内部电极的重叠面积大于第二驱动部的第三和第二内部电极的重叠面积。