公开(公告)号：US20210313130A1

公开(公告)日：2021-10-07

申请号：US17354432

申请日：2021-06-22

Applicant: TDK CORPORATION

Inventor： Akifumi KAMIJIMA ,  Atsushi IIJIMA ,  Kyung-Ku CHOI ,  Katsunori OSANAI ,  Daisuke IWANAGA

IPC: H01H47/00 ,  H01H50/00 ,  H01H50/44 ,  H01H50/64 ,  H01H50/36 ,  H01H50/54 ,  H01H50/18

Abstract: A magnetically actuated MEMS switch 100 includes a first magnetic core portion 120, a first signal line 15, a first contact point 16, a second magnetic core portion 220, a second signal line 25, a second contact point 26, and a first coil portion 111 and a second coil portion 211 serving as a magnetic field applying portion that causes a current to flow in conductor coil to apply a magnetic field to the first magnetic core portion 120 and the second magnetic core portion 220. The first contact point 16 is displaced depending on the presence or absence of a magnetic field applied by the magnetic field applying portion. Connection and disconnection between the first contact point 16 and the second contact point 26 are switched in response to displacement of the first contact point 16.

公开(公告)号：US20130150226A1

公开(公告)日：2013-06-13

申请号：US13677763

申请日：2012-11-15

Applicant: TDK CORPORATION

Inventor： Raitarou MASAOKA ,  Toshio SAKURAI ,  Tomohiro ARASHI ,  Kyung-Ku CHOI ,  Kiyoshi HATANAKA

IPC: C03C14/00

CPC classification number: C04B35/462 ,  C03C14/00 ,  C04B35/20 ,  C04B35/468 ,  C04B35/62685 ,  C04B2235/3215 ,  C04B2235/3224 ,  C04B2235/3234 ,  C04B2235/3236 ,  C04B2235/3284 ,  C04B2235/3409 ,  C04B2235/3445 ,  C04B2235/36 ,  C04B2235/77 ,  H01G4/1227

Abstract: A dielectric ceramic composition includes a component represented by composition formula {α(xBaO.yNd2O3.zTiO2)+β(2MgO.SO2)} as a main component and zinc oxide, boron oxide, and a glass having a softening point equal to or lower than a certain temperature as minor components with respect to the main component. In the dielectric ceramic composition, x, y, and z that respectively represent molar ratios of BaO, Nd2O3, and TiO2 are in certain ranges and α and β that represent volume ratios of subcomponents (xBaO.yNd2O3.zTiO2 and 2MgO.SiO2) in the main component are in certain ranges. When the minor components are respectively represented by aZnO, bB2O3, and cglass, a, b, and c that represent mass ratios of the respective minor components to the main component are in certain ranges.

Abstract translation: 电介质陶瓷组合物包含由组成式{α（xBaO.yNd2O3.zTiO2）+β（2MgO.SO2）}为主要成分表示的组分，氧化锌，氧化硼和软化点等于或低于 比一定温度作为相对于主要组分的次要组分。 在电介质陶瓷组合物中，分别表示BaO，Nd 2 O 3和TiO 2的摩尔比的x，y和z在一定范围内，α和β表示亚组分（xBaO.yNd2O3.zTiO2和2MgO.SiO2）的体积比 主要成分在一定范围内。 当次要组分分别由ZnO，bB 2 O 3和C玻璃表示时，表示各个次要组分与主要组分的质量比的a，b和c在一定范围内。

公开(公告)号：US20240241114A1

公开(公告)日：2024-07-18

申请号：US18433865

申请日：2024-02-06

Applicant: TDK CORPORATION

Inventor： Takeshi SAKAMOTO ,  Kyung-Ku CHOI

IPC: G01N33/543 ,  B01L3/00 ,  G01N27/327 ,  G01N27/42 ,  G01N33/553

CPC classification number: G01N33/5438 ,  B01L3/50 ,  G01N27/3276 ,  G01N27/42 ,  G01N33/54326 ,  G01N33/553 ,  B01L2300/0645

Abstract: This analysis kit includes a sensor having a working electrode, a reference electrode and a counter electrode, primary antibodies being fixed to a surface of the working electrode of the sensor, and a dispersion liquid of magnetic metal nanoparticles including solvent and magnetic metal nanoparticles dispersed in the solvent, secondary antibodies being fixed to surfaces of the magnetic metal nanoparticles.

公开(公告)号：US20140311287A1

公开(公告)日：2014-10-23

申请号：US14254220

申请日：2014-04-16

Applicant: TDK CORPORATION

Inventor： Yasushi ENOKIDO ,  Kyung-Ku CHOI ,  Ryuji HASHIMOTO ,  Daisuke TANAKA

IPC: H01F1/053

CPC classification number: H01F1/0536 ,  H01F1/0577

Abstract: The present invention provides a permanent magnet with excellent temperature characteristics and without magnetic properties significantly decreased compared to the existing R-T-B based magnet. By means that the R-T-B based magnet as the raw material is applied to heating treatment for a long time, the main phase grains will turn into core-shell like, and said R-T-B based magnet comprises main phase grains having core portion and shell portion that covers the core. When the mass concentration of RI and Y in the core portion is set as αR1 and αY respectively and the mass concentration of R1 and Y in the shell portion is set as βR1 and βY respectively, the ratio (B/A) between the mass concentration ratio of R1 to Y in the shell portion (βR1/βY=B) and the mass concentration ratio of R1 to Y in the core portion (αR1/αY=A) is 1.1 or more. Thus, the decrease of coercivity caused by Y addition is prevented, and the increase effect of temperature characteristics caused by addition of Y will lead to improve the magnetic properties under high temperature.

Abstract translation: 本发明提供一种与现有的R-T-B基磁体相比，具有优异的温度特性和不具有磁性能的永磁体。 通过将作为原料的RTB型磁体长时间地应用于加热处理，主相晶粒将变成芯 - 壳状，并且所述RTB基磁体包括具有芯部的主相晶粒和覆盖的芯部分 核心。 核心部分的RI和Y的质量浓度分别设定为αR1和αY，并且壳部分中的R1和Y的质量浓度分别设置为＆Bgr; R1和＆bgr; Y，比率（B / A） 在壳部分中的R1与Y的质量浓度比（＆Bgr; R1 /＆bgr; Y = B）和芯部中的R1与Y的质量浓度比（αR1/αY= A）之间为1.1以上。 因此，防止由Y添加引起的矫顽力的降低，并且由于添加Y引起的温度特性的增加效果将导致在高温下提高磁性能。

公开(公告)号：US20200082964A1

公开(公告)日：2020-03-12

申请号：US16494791

申请日：2018-03-30

Applicant: TDK CORPORATION

Inventor： Takeshi SAKAMOTO ,  Yoshihiro SHINKAI ,  Yu YONEZAWA ,  Hideharu MORO ,  Kensuke ARA ,  Tohru OIKAWA ,  Isao KANADA ,  Kenji HORINO ,  Kyung-Ku CHOI

IPC: H01F1/33 ,  H01F1/24 ,  H01F27/255 ,  H01F17/04 ,  H01F17/00

Abstract: A composite magnetic body with high permeability and low magnetic loss in a high-frequency region of a gigahertz band; and a high-frequency electronic component using the same, the electronic component being compact and having low-insertion loss. This composite magnetic body has a high permeability and a low magnetic loss especially in a high-frequency region of a gigahertz band, and is provided with: a plurality of magnetic nanowires 361-363 aligned so as not to cross each other; and insulators 365-367 that electrically insulate the plurality of magnetic nanowires 361-363.

公开(公告)号：US20190318893A1

公开(公告)日：2019-10-17

申请号：US16377418

申请日：2019-04-08

Applicant: TDK CORPORATION

Inventor： Akifumi KAMIJIMA ,  Atsushi IIJIMA ,  Kyung-Ku CHOI ,  Katsunori OSANAI ,  Daisuke IWANAGA

IPC: H01H47/00 ,  H01H50/00 ,  H01H50/44 ,  H01H50/18 ,  H01H50/36 ,  H01H50/54 ,  H01H50/64

Abstract: A magnetically actuated MEMS switch 100 includes a first magnetic core portion 120, a first signal line 15, a first contact point 16, a second magnetic core portion 220, a second signal line 25, a second contact point 26, and a first coil portion 111 and a second coil portion 211 serving as a magnetic field applying portion that causes a current to flow in conductor coil to apply a magnetic field to the first magnetic core portion 120 and the second magnetic core portion 220. The first contact point 16 is displaced depending on the presence or absence of a magnetic field applied by the magnetic field applying portion. Connection and disconnection between the first contact point 16 and the second contact point 26 are switched in response to displacement of the first contact point 16.

公开(公告)号：US20140320243A1

公开(公告)日：2014-10-30

申请号：US14257206

申请日：2014-04-21

Applicant: TDK CORPORATION

Inventor： Ryuji HASHIMOTO ,  Kenichi SUZUKI ,  Kyung-Ku CHOI

IPC: H01F1/057

CPC classification number: H01F1/057 ,  H01F10/126

Abstract: The present invention provides a permanent magnet whose magnetic properties will not be significantly decreased and which is excellent in the temperature properties compared to the existing R-T-B based permanent magnet. In the R-T-B based structure, a stack structure of R1-T-B based crystallizing layer and (Y,Ce)-T-B based crystallizing layer can be formed by alternatively stacking R1-T-B and (Y,Ce)-T-B. In this way, a high magnetic anisotropy field of the R1-T-B based crystallizing layer can be maintained while an improved temperature coefficient of the (Y,Ce)-T-B based crystallizing layer can be obtained. Further, a high coercivity can be obtained by adding the Ce-T-B based crystallizing layer with a low lattice distortion to the Y-T-B based crystallizing layer.

Abstract translation: 本发明提供一种与现有的R-T-B系永久磁铁相比，其磁特性不会显着降低且温度特性优异的永磁体。 在基于R-T-B的结构中，可以通过交替堆叠R1-T-B和（Y，Ce）-T-B来形成R1-T-B系结晶层和（Y，Ce）-T-B系结晶层的堆叠结构。 以这种方式，可以保持基于（Y，Ce）-T-B的结晶层的温度系数提高的R1-T-B系结晶层的高磁各向异性场。 此外，通过向基于Y-T-B的结晶层添加具有低晶格畸变的Ce-T-B系结晶层，可以获得高的矫顽力。

公开(公告)号：US20140311291A1

公开(公告)日：2014-10-23

申请号：US14258645

申请日：2014-04-22

Applicant: TDK CORPORATION

Inventor： Yasushi ENOKIDO ,  Kyung-Ku CHOI ,  Kenichi SUZUKI ,  Daisuke TANAKA

IPC: H01F1/053

CPC classification number: H01F1/0536 ,  B22F1/00 ,  B22F2998/10 ,  B22F2999/00 ,  B32B15/015 ,  C22C33/0278 ,  C22C38/002 ,  C22C38/005 ,  C22C38/06 ,  C22C38/10 ,  C22C38/16 ,  C22C2202/02 ,  H01F1/0577 ,  B22F2304/10 ,  B22F3/02 ,  B22F2202/05 ,  B22F9/08 ,  B22F9/023 ,  B22F2009/044 ,  B22F3/10 ,  B22F2003/248

Abstract: The present invention provides a permanent magnet with excellent adhesion strength with plated layer and without significant decrease in magnetic properties, compared to the conventional R-T-B based magnet. By means that the R-T-B based magnet as the raw material is applied to heating treatment for a long time, the major phase grains will form core-shell like structures in the R-T-B based magnet in which R1 and Ce are included as an essential of R. When the mass concentration of R1 and Ce in the core portion is set as αR1 and αCe respectively and that of R1 and Ce in the shell portion is set as βR1 and βCe respectively, the ratio (B/A) between the mass concentration ratio of R1 to Ce in the shell portion (βR1/βCe=B) and that of R1 to Ce in the core portion (αR1/αCe=A) is 1.1 or more.

Abstract translation: 与常规的R-T-B系磁铁相比，本发明提供了一种与镀层具有优异粘合强度并且磁性能没有显着降低的永磁体。 通过将作为原料的RTB型磁体长时间地应用于加热处理，主相晶粒将在RTB基磁体中形成核壳状结构，其中包含R1和Ce作为R的必要条件。 核心部分的R1和Ce的质量浓度分别设定为αR1和αCe，壳部分中的R1和Ce的质量浓度分别设定为R1和＆bgr; Ce时，比例（B / A） 外壳部分（＆bgr; R1 / bgr; Ce = B）中的R1〜Ce的质量浓度比以及芯部（αR1/αCe= A）的R1〜Ce的质量浓度比为1.1以上。