公开(公告)号：US11665967B2

公开(公告)日：2023-05-30

申请号：US16957241

申请日：2018-10-25

Applicant: TDK CORPORATION

Inventor： Ryuhei Sasaki ,  Yoshikazu Shimura ,  Yoshiki Ohta ,  Kazushi Tachimoto ,  Hideya Sakamoto ,  Tetsuyuki Taniguchi ,  Akihiro Takeda

IPC: H01L41/09

CPC classification number: H10N30/2047 ,  H10N30/50

Abstract: A vibration device includes a piezoelectric vibrator having a piezoelectric element and a diaphragm having a pair of main surfaces facing each other, the piezoelectric element being bonded to the main surface, a vibration member where the piezoelectric vibrator is disposed, and an adhesive member disposed between the diaphragm and the vibration member and bonding the diaphragm and the vibration member. Each of the pair of main surfaces of the diaphragm has a rectangular shape when viewed from a facing direction of the pair of main surfaces, and the adhesive member is disposed in a facing manner on at least a pair of sides of the main surfaces.

公开(公告)号：US11581479B2

公开(公告)日：2023-02-14

申请号：US16957191

申请日：2018-12-12

Applicant: TDK CORPORATION

Inventor： Yoshikazu Shimura ,  Kaoru Kijima ,  Hideya Sakamoto ,  Kazushi Tachimoto ,  Ryuhei Sasaki ,  Yoshiki Ohta ,  Akihiro Takeda

IPC: H01L41/083 ,  H01L41/047

Abstract: In a piezoelectric element, shift of a resonance point to a low-pitched sound side is achieved. A resonance point of a piezoelectric element moves to a low-pitched sound side when an active region is configured to be surrounded by an inactive region as in the configuration of the piezoelectric element. According to the piezoelectric element whose resonance point is moved to a low-pitched sound side, the piezoelectric element can realize a sound pressure that is sufficiently high for practical use when it is applied to an acoustic device.

公开(公告)号：US10770641B2

公开(公告)日：2020-09-08

申请号：US15720288

申请日：2017-09-29

Applicant: TDK CORPORATION

Inventor： Yoshiki Ohta ,  Hideya Sakamoto ,  Kazushi Tachimoto ,  Nobuo Furukawa ,  Akihiro Takeda

IPC: H01L41/04 ,  H01L41/187 ,  H01L41/083 ,  H01L41/047 ,  H01L41/09

Abstract: A piezoelectric element includes first and second electrodes, a first piezoelectric body layer, and a plurality of first through-hole conductors. The first and second electrodes oppose each other. The first piezoelectric body layer is disposed between the first electrode and the second electrode. The plurality of first through-hole conductors penetrates the first piezoelectric body layer and is connected to the first electrode and the second electrode. When seen in an opposing direction of the first and second electrodes, the plurality of first through-hole conductors is arrayed in a matrix.

公开(公告)号：US09698333B2

公开(公告)日：2017-07-04

申请号：US14604340

申请日：2015-01-23

Applicant: TDK CORPORATION

Inventor： Satoshi Ozawa ,  Kohsuke Shimazaki ,  Haruo Taguchi ,  Akihiro Takeda

IPC: H01L41/083 ,  H01L41/053 ,  H02N2/04

CPC classification number: H01L41/0533 ,  H01L41/0475 ,  H01L41/083 ,  H01L41/313 ,  H02N2/025 ,  H02N2/04

Abstract: A piezoelectric element unit comprises an element body having internal electrodes laminated with piezoelectric layers therebetween and a pair of external electrodes electrically connected to the internal electrodes and an electric connection part for connecting a wiring part to the external electrodes. The electric connection part is composed of a conductive resin adhesive part and the conductive resin adhesive part is covered by a resin part.