公开(公告)号：US11780767B2

公开(公告)日：2023-10-10

申请号：US16923552

申请日：2020-07-08

Applicant: TDK CORPORATION

Inventor： Shin Takane ,  Yousuke Futamata ,  Kenichi Sakai ,  Yasuharu Miyauchi

IPC: C03C10/00 ,  H01L23/15 ,  H05K1/03 ,  B32B17/06 ,  H05K1/02

CPC classification number: C03C10/0009 ,  B32B17/06 ,  C03C10/0036 ,  C03C10/0045 ,  H01L23/15 ,  H05K1/0306 ,  B32B2307/206 ,  B32B2315/08 ,  B32B2457/08 ,  C03C2204/00 ,  H05K1/0298

Abstract: A glass ceramic sintered body having a small dielectric loss in a high frequency band of 10 GHz or higher and a wiring substrate using the same are provided. The glass ceramic sintered body contains crystallized glass, an alumina filler, and silica. The content of the crystallized glass is 45 mass % to 85 mass %, the content of the alumina filler is 14.8 mass % to 50.1 mass % in terms of Al2O3, and the content of silica is 0.2 mass % to 4.9 mass % in terms of SiO2.

公开(公告)号：US20250125781A1

公开(公告)日：2025-04-17

申请号：US18910435

申请日：2024-10-09

Applicant: TDK CORPORATION

Inventor： Yuta ASHIDA ,  Shin Takane ,  Shuhei Sawaguchi ,  Tomonori Terui ,  Keigo Shibuya ,  Tetsuzo Goto ,  Masahiro Tatematsu

IPC: H03H7/01

Abstract: A filter device includes a stack including a plurality of dielectric layers stacked together, and a resonator configured using a conductor integrated into the stack. Each of the plurality of dielectric layers is formed of a dielectric material, and has a resonance frequency that changes depending on a temperature. In the dielectric material, the resonance frequency changes linearly with respect to a change in the temperature when the temperature is within a first temperature range, and the resonance frequency changes nonlinearly with respect to the change in the temperature when the temperature is within a second temperature range.

公开(公告)号：US09793608B2

公开(公告)日：2017-10-17

申请号：US14555159

申请日：2014-11-26

Applicant: TDK CORPORATION

Inventor： Tomokazu Ishikura ,  Shin Takane ,  Norizumi Asano ,  Kosuke Kunitsuka

IPC: H01Q7/06 ,  H01Q7/08 ,  C02F1/46 ,  H01Q1/22 ,  H01F1/34 ,  G06K19/077 ,  C04B35/26 ,  C04B35/638

CPC classification number: H01Q7/06 ,  C04B35/26 ,  C04B35/638 ,  C04B2235/3232 ,  C04B2235/3277 ,  C04B2235/3279 ,  C04B2235/3281 ,  C04B2235/3284 ,  C04B2235/6562 ,  C04B2235/72 ,  G06K19/07771 ,  H01F1/344 ,  H01Q1/2225

Abstract: An object is to provide a ferrite composition suitable for an antenna element with a long communication distance in a high-frequency band (for example, 13.56 MHz), a ferrite plate formed of the ferrite composition, a magnetic member for an antenna element formed of the ferrite plate, and an antenna element provided with a member for an antenna element. A ferrite composition, wherein: main components contain, with Fe2O3 conversion, 45.0-49.5 mol % of iron oxide, with CuO conversion, 4.0-16.0 mol % of copper oxide, with ZnO conversion, 19.0-25.0 mol % of zinc oxide, a remaining portion is constituted by nickel oxide, an inevitable impurity is removed with respect to the main components, and as accessory components, with TiO2 conversion, 0.5-2 weight % of titanium oxide, with CoO conversion, 0.35-2 weight % of cobalt oxide are contained.

公开(公告)号：US11267749B2

公开(公告)日：2022-03-08

申请号：US16923531

申请日：2020-07-08

Applicant: TDK CORPORATION

Inventor： Shin Takane ,  Yousuke Futamata ,  Yasuharu Miyauchi

IPC: C03C10/00 ,  H01B3/08

Abstract: A glass ceramic sintered body having a small dielectric loss in a high frequency band of 10 GHz or higher and stable characteristics against temperature variation and a wiring substrate using the same are provided. The glass ceramic sintered body contains crystallized glass, an alumina filler, silica, and strontium titanate. The content of the crystallized glass is 50 mass % to 80 mass %, the content of the alumina filler is 15.6 mass % to 31.2 mass % in terms of Al2O3, the content of silica is 0.4 mass % to 4.8 mass % in terms of SiO2, and the content of the strontium titanate is 4 mass % to 14 mass % in terms of SrTiO3.

公开(公告)号：US10727557B2

公开(公告)日：2020-07-28

申请号：US16227558

申请日：2018-12-20

Applicant: TDK CORPORATION

Inventor： Yuta Ashida ,  Shigemitsu Tomaki ,  Yousuke Futamata ,  Shin Takane ,  Yasuharu Miyauchi ,  Kazunari Kimura

IPC: H01P7/10 ,  H01P1/30 ,  H01P11/00 ,  H01P1/20 ,  H01P1/208

Abstract: A dielectric filter includes a plurality of dielectric resonators. The dielectric filter also includes: a plurality of resonator body portions each formed of a first dielectric and respectively corresponding to the plurality of dielectric resonators, the first dielectric having a first relative permittivity; a peripheral dielectric portion formed of a second dielectric and lying around the plurality of resonator body portions, the second dielectric having a second relative permittivity lower than the first relative permittivity; and a shield portion formed of a conductor. Either one of a temperature coefficient of resonant frequency of the first dielectric at 25° C. to 85° C. and a temperature coefficient of resonant frequency of the second dielectric at 25° C. to 85° C. has a positive value and the other has a negative value.