公开(公告)号：US20230283253A1

公开(公告)日：2023-09-07

申请号：US18098929

申请日：2023-01-19

Applicant: TDK CORPORATION

Inventor： Katsunari MORIAI ,  Shunsuke OGURA ,  Takeshi OYANAGI ,  Ryo MORITA ,  Yusuke IMAI

IPC: H03H7/06 ,  H03H7/01

CPC classification number: H03H7/06 ,  H03H7/17 ,  H02H9/04 ,  H03H2007/013

Abstract: A notch filter 100 includes a varistor 1 that is connected between a signal line SL and a ground G. The varistor 1 has a capacitive component and outputs a signal with a second frequency different from a signal with a first frequency flowing in the signal line SL and a signal with the second frequency superimposed on the signal line SL to the ground G.

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。