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.

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：US20150028723A1

公开(公告)日：2015-01-29

申请号：US14335337

申请日：2014-07-18

Applicant: TDK CORPORATION

Inventor： Yoshiki IKEDA ,  Keiji OGUCHI

IPC: H02N2/00 ,  H01L41/08

CPC classification number: H01L41/0471 ,  H01L41/0474 ,  H01L41/0913 ,  H02N2/004 ,  H02N2/026

Abstract: A piezoelectric actuator comprises a substantially rectangular parallelepiped piezoelectric element. One outer surface of the piezoelectric element includes a first region, and a second region located such as to project from the first region and to overlap a region corresponding to an active portion in the one outer surface. The second region has a flat surface configured to come into contact with a body to be driven and to generate a frictional force therewith. The flat surface is shorter in a longitudinal direction of the piezoelectric element than in a lateral direction thereof. The flat surface is longer in the longitudinal direction of the piezoelectric element at a lateral center region thereof than at a lateral end region thereof.

Abstract translation: 压电致动器包括大致长方体形的压电元件。 压电元件的一个外表面包括第一区域和位于第一区域的第二区域，并且与第一区域中的有效部分对应的区域重叠。 第二区域具有被构造成与待驱动的主体接触并且与其产生摩擦力的平坦表面。 扁平表面在压电元件的纵向方向上比在其横向方向上更短。 扁平表面在其横向中心区域处的压电元件的纵向方向上比在其横向端部区域处长。