公开(公告)号：US20220209096A1

公开(公告)日：2022-06-30

申请号：US17531976

申请日：2021-11-22

Applicant: TDK CORPORATION

Inventor： Keisuke TERANISHI ,  Hiroki MITSUI ,  Miho KATO ,  Hideya SAKAMOTO ,  Narumi SATO

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

Abstract: The vibration device includes a piezoelectric element having a connection terminal exposed from a main surface of the piezoelectric element, a first resin layer having conductivity and covering the connection terminal of the piezoelectric element to be electrically connected to the connection terminal, a wiring member overlapping the main surface of the piezoelectric element to cover the first resin layer, including a wire electrically connected to the first resin layer, and extending beyond one end of the piezoelectric element when viewed in a thickness direction of the piezoelectric element, and a second resin layer integrally covering the main surface of the piezoelectric element and the wiring member. The second resin layer includes a first layer in direct contact with the piezoelectric element and the wiring member, and a second layer covering the piezoelectric element and the wiring member via the first layer.

公开(公告)号：US20230320225A1

公开(公告)日：2023-10-05

申请号：US18182851

申请日：2023-03-13

Applicant: TDK Corporation

Inventor： Hiroki MITSUI ,  Hideya Sakamoto ,  Yoshiki Ohta ,  Miho Kato ,  Hiroyuki Ijiri ,  Akihiro Takeda

IPC: H10N30/87 ,  H10N30/50

CPC classification number: H10N30/871 ,  H10N30/508

Abstract: A piezoelectric element includes a piezoelectric body, an external electrode, and an internal electrode. The internal electrode includes first and second internal conductors opposing each other. The first internal conductor includes first and second conductor portions continuous with each other. The second internal conductor includes a third conductor portion opposing the first conductor portion in a direction where the first and second internal conductors oppose each other, and a fourth conductor portion including a first region connected to the second conductor portion, and a second region continuous with the first region and continuous with the third conductor portion. The piezoelectric body includes a body portion located between the first and the second internal conductors, and formed with a through hole penetrating the body portion in the direction. The fourth conductor portion is located in the through hole and has a thickness increasing toward a center line of the through hole.