公开(公告)号：US20210384409A1

公开(公告)日：2021-12-09

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

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：US20200282426A1

公开(公告)日：2020-09-10

申请号：US16759593

申请日：2018-10-25

Applicant: TDK CORPORATION

Inventor： Yoshiki OHTA ,  Kazushi TACHIMOTO ,  Hideya SAKAMOTO ,  Tetsuyuki TANIGUCHI ,  Tatsuya TAKI ,  Tomohiro TAKEDA ,  Akihiro TAKEDA

IPC: B06B1/06 ,  H01L41/047 ,  H01L41/083 ,  H01L41/09

Abstract: A piezoelectric element includes a piezoelectric element body including a first principal surface and a second principal surface opposing each other, and a plurality of external electrodes disposed on the first principal surface. A vibration member includes a third principal surface opposing the second principal surface. The piezoelectric element is joined to the third principal surface. A wiring member is electrically connected to the piezoelectric element. The wiring member includes a region located on the plurality of external electrodes and joined to the plurality of external electrodes. The region of the wiring member monolithically covers the plurality of external electrodes when viewed from a direction orthogonal to the first principal surface.

公开(公告)号：US20190312190A1

公开(公告)日：2019-10-10

申请号：US16373749

申请日：2019-04-03

Applicant: TDK CORPORATION

Inventor： Yoshiki OHTA ,  Hideya SAKAMOTO ,  Kazushi TACHIMOTO ,  Yoshikazu SHIMURA ,  Tetsuyuki TANIGUCHI ,  Akihiro TAKEDA

IPC: H01L41/083 ,  H01L41/047 ,  H01L41/053 ,  H01L41/09

Abstract: A piezoelectric element includes a piezoelectric body, an electrode layer, and a reinforcing layer. The piezoelectric body has a first main surface, a second main surface, and a side surface. The first main surface and the second main surface oppose each other. The side surface extends in an opposing direction in which the first main surface and the second main surface oppose each other in such a way as to connect the first main surface and the second main surface. The electrode layer is provided in the piezoelectric body. The reinforcing layer is provided on the first main surface. The electrode layer is provided opposing the first main surface and apart from the side surface. When viewed from the opposing direction, the electrode layer has a corner. When viewed from the opposing direction, the reinforcing layer overlaps the corner.

公开(公告)号：US20190088851A1

公开(公告)日：2019-03-21

申请号：US16128887

申请日：2018-09-12

Applicant: TDK CORPORATION

Inventor： Yoshiki OHTA ,  Tetsuyuki TANIGUCHI ,  Hideya SAKAMOTO ,  Kazushi TACHIMOTO ,  Junpei KIKUCHI ,  Akihiro TAKEDA

IPC: H01L41/083 ,  H01L41/277 ,  H01L41/047 ,  H01L41/053 ,  H01L41/09

Abstract: A multilayer piezoelectric element includes a piezoelectric element body, a first internal electrode and a second internal electrode, a plurality of first connecting conductors, a plurality of second connecting conductors, and an external member. The piezoelectric element body is formed by laminating a plurality of piezoelectric element body layer. The piezoelectric element body includes a first main surface and a second main surface, and a side surface. The plurality of first connecting conductors are connected to the first internal electrode. The plurality of second connecting conductors are connected to the second internal electrode. The external member is conductive and is bonded to the first main surface in such a way as to cover the first end portions of the plurality of first connecting conductors. The external member is electrically connected to the plurality of first connecting conductors.