公开(公告)号：US20240074320A1

公开(公告)日：2024-02-29

申请号：US18454341

申请日：2023-08-23

Applicant: TDK CORPORATION

Inventor： Shuto ONO ,  Satoshi SASAKI ,  Yasuyuki SATOH ,  Keiji OGUCHI

IPC: H10N30/87

CPC classification number: H10N30/87

Abstract: A piezoelectric element includes a piezoelectric body and first, second, third, and fourth electrode layers disposed in the piezoelectric body. Each of the first, second, third, and fourth electrode layers includes a pair of first electrodes and a pair of second electrodes. The first and second electrodes included in the first electrode layer oppose the second and first electrodes included in the second electrode layer, respectively, with a part of the piezoelectric body. The first and second electrodes included in the second electrode layer oppose the first and second electrodes included in the third electrode layer, respectively, with a part of the piezoelectric body. The first and second electrodes included in the third electrode layer oppose the second and first electrodes included in the fourth electrode layer, respectively, with a part of the piezoelectric body.

公开(公告)号：US20220376163A1

公开(公告)日：2022-11-24

申请号：US17761265

申请日：2020-12-11

Applicant: TDK Corporation

Inventor： Shuto ONO

IPC: H01L41/083 ,  H01L41/047

Abstract: A multilayer piezoelectric element includes a piezoelectric body containing a piezoelectric ceramic material, a first electrode, and a second electrode. The piezoelectric body includes a first main surface and a second main surface opposing each other. The first electrode includes an external electrode formed on the first main surface. The second electrode includes an internal electrode formed inside the piezoelectric body to oppose the external electrode. The piezoelectric body includes an active region between the external electrode and the internal electrode, and includes an inactive region opposite to the active region with the internal electrode interposed therebetween. A stress received by the piezoelectric body from the external electrode is larger than a stress received by the piezoelectric body from the internal electrode. A polarization direction of the active region is a direction directed from the external electrode to the internal electrode.

公开(公告)号：US20170040525A1

公开(公告)日：2017-02-09

申请号：US15227249

申请日：2016-08-03

Applicant: TDK CORPORATION

Inventor： Yoshiki IKEDA ,  Kazuo NAGATA ,  Shuto ONO ,  Shunsuke OGURA ,  Yuya SATO

IPC: H01L41/09 ,  H01L41/053 ,  H01L41/047

CPC classification number: H01L41/09 ,  G11B5/5552 ,  H01L41/0471 ,  H01L41/0474 ,  H01L41/053 ,  H01L41/0933 ,  H01L41/0986

Abstract: A piezoelectric element includes a piezoelectric body, an external electrode, and an internal electrode. The piezoelectric body includes first and second main surfaces opposing each other. The external electrode is disposed on the first main surface and has a first polarity. The internal electrode is disposed in the piezoelectric body to oppose the external electrode in a direction in which the first main surface and the second main surface oppose each other and has a second polarity different from the first polarity. A region from the internal electrode to the external electrode in the piezoelectric body is a polarizing region, and a region from the internal electrode to the second main surface in the piezoelectric body is a non-polarizing region.

Abstract translation: 压电元件包括​​压电体，外部电极和内部电极。 压电体包括彼此相对的第一和第二主表面。 外部电极设置在第一主表面上并具有第一极性。 内部电极设置在压电体中，以使第一主表面和第二主表面彼此相对的方向与外部电极相对，并且具有与第一极性不同的第二极性。 压电体内的从内部电极到外部电极的区域是偏振区域，压电体内部电极到第二主表面的区域是非偏振区域。

公开(公告)号：US20230240143A1

公开(公告)日：2023-07-27

申请号：US18071238

申请日：2022-11-29

Applicant: TDK CORPORATION

Inventor： Shuto ONO ,  Satoshi SASAKI ,  Yasuyuki SATOH ,  Keiji OGUCHI

IPC: H02K29/00

CPC classification number: H10N30/20 ,  H10N30/87 ,  H10N30/88

Abstract: A piezoelectric actuator includes a piezoelectric element having a rectangular shape, a first supporter, and a second supporter. The piezoelectric element includes a pair of main surfaces opposing each other, a first end surface and a second end surface opposing each other in a long side direction of the pair of main surfaces, and a first side surface and a second side surface opposing each other in a short side direction of the pair of main surfaces. The first supporter is provided to be movable according to deformation of the first end surface. The second supporter is provided to be movable according to deformation of the first side surface. The first supporter includes an opposing portion and a protruding portion. The opposing portion opposes the second supporter in the long side direction. The protruding portion protrudes from the opposing portion and abuts on the second supporter.

公开(公告)号：US20170155033A1

公开(公告)日：2017-06-01

申请号：US15363800

申请日：2016-11-29

Applicant: TDK CORPORATION

Inventor： Yoshiki IKEDA ,  Kazuo NAGATA ,  Shuto ONO ,  Syogo SAITO

IPC: H01L41/09 ,  G11B5/48 ,  H01L41/047

Abstract: A piezoelectric element includes a piezoelectric body, a first electrode, a second electrode, a third electrode, and a first through hole conductor. The piezoelectric body includes first and second main surfaces opposing each other, and first and second end surfaces opposing each other. The first electrode is disposed on the first main surface. The second electrode is disposed apart from the first electrode on the first main surface. The third electrode is disposed in the piezoelectric body to oppose the first electrode. The first through hole conductor is connected to the second and third electrodes. The piezoelectric body includes an active region and an inactive region. The active region includes a region from the first electrode to the third electrode. The inactive region includes a region from the third electrode to the second main surface.