公开(公告)号：US20240312695A1

公开(公告)日：2024-09-19

申请号：US18429973

申请日：2024-02-01

Applicant: TDK Corporation

Inventor： Nobuyuki OKUZAWA ,  Yuichi TAKUBO ,  Ryuji HASHIMOTO ,  Yuta TAKAHASHI ,  Hiroki HOSAKA

IPC: H01F27/29 ,  H01F17/00

CPC classification number: H01F27/292 ,  H01F17/0013

Abstract: An electronic component includes: an element body having a main surface as a mounting surface; and a pair of external electrodes including an electrode layer embedded inside an opening of the element body and a plating layer formed on the electrode layer, in a first direction perpendicular to the main surface, a main surface of the electrode layer is disposed deeper inside the element body than a virtual plane obtained by virtually extending the main surface in the opening, and the plating layer is formed on the main surface of the electrode layer and covers the electrode layer so as to extend from the virtual plane to a main surface of the element body.

公开(公告)号：US20210043344A1

公开(公告)日：2021-02-11

申请号：US16965905

申请日：2019-01-29

Applicant: TDK CORPORATION

Inventor： Masaki TOMITA ,  Ryuji HASHIMOTO ,  Takashi WATANABE

IPC: H01F1/059

Abstract: A permanent magnet including R and T. R are rare earth elements including Sm and at least one selected from Y and Gd. T is Fe alone or Fe and Co. T maybe partly substituted with M, and M is one or more selected from Ti, V, Cr, Mo, W, Zr, Hf, Nb, Ta, Al, Si, Cu, Zn, Ga and Ge. In a total content of R, Sm content is 60 at % or more and 95 at % or less, and a total content of Y and Gd is 5 at % or more and 35 at % or less. The permanent magnet includes main phase crystal grains having a ThMn12 type crystal structure.

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：US20250111969A1

公开(公告)日：2025-04-03

申请号：US18892837

申请日：2024-09-23

Applicant: TDK Corporation

Inventor： Nobuyuki OKUZAWA ,  Ryuji HASHIMOTO ,  Yuiko HIROSE ,  Yuta TAKAHASHI ,  Hiroki HOSAKA ,  Koki ENDO

IPC: H01F5/04 ,  H01F1/03 ,  H01F5/06 ,  H01F17/02

Abstract: A coil component includes an element body formed by laminating a plurality of insulator layers, and a pillar part disposed in the element body and extending in a lamination direction of the plurality of insulator layers. The pillar part has a plurality of pillar members laminated in the lamination direction. Between the two pillar members in the lamination direction, a defining part that defines a contact surface between the two pillar members is provided. The defining part is formed of a material different from a material of the pillar part, and is disposed at edges of the two pillar members when viewed from the lamination direction.

公开(公告)号：US20170047151A1

公开(公告)日：2017-02-16

申请号：US15304193

申请日：2015-03-10

Applicant: TDK CORPORATION

Inventor： Shogo KADOTA ,  Kenichi SUZUKI ,  Yuji UMEDA ,  Ryuji HASHIMOTO ,  Keiji TAKEDA

IPC: H01F1/057 ,  C22C38/00 ,  H01F1/055 ,  B22F3/16 ,  H01F1/058 ,  H01F1/059

CPC classification number: H01F1/057 ,  B22F3/16 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C2202/02 ,  H01F1/0556 ,  H01F1/0557 ,  H01F1/0577 ,  H01F1/058 ,  H01F1/059

Abstract: To provide a permanent magnet which uses Ce of an abundant resource and has a great magnetic anisotropy in rare earth permanent magnets. To obtain a permanent magnet having a high magnetic anisotropy due to the trivalent Ce state by setting the abundance ratio C3/(C3+C4) in the main phase grains to be 0.1≦C3/(C3+C4)≦0.5 where C3 denotes the number of trivalent Ce atoms and C4 denotes the number of tetravalent Ce atoms.

Abstract translation: 提供一种使用丰富资源的Ce并且在稀土永磁体中具有很大的磁各向异性的永磁体。 为了通过将主相晶粒中的丰度比C3 /（C3 + C4）设定为0.1≤C3/（C3 + C4）≤0.5，由于三价Ce状态而获得具有高磁各向异性的永磁体，其中C3表示 三价Ce原子数，C4表示四价Ce原子数。

公开(公告)号：US20140320245A1

公开(公告)日：2014-10-30

申请号：US14261516

申请日：2014-04-25

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 such a permanent magnet that its magnetic properties will not significantly decrease and it can be prepared at a lower temperature, compared to conventional R-T-B based permanent magnets. In the R-T-B based structure, a stacked structure of R1-T-B based crystal layer and Ce-T-B based crystal layer can be formed by alternatively stacking the R1-T-B based crystal layer and the Ce-T-B based crystal layer. In this way, a high magnetic anisotropy field of the R1-T-B based crystal layer can be maintained while the crystallization temperature can be lowered by the Ce-T-B based crystal layer.

Abstract translation: 本发明提供这样的永磁体，其磁性能不会显着降低，并且与常规的R-T-B基永磁体相比可以在较低的温度下制备。 在基于R-T-B的结构中，可以通过交替堆叠R1-T-B基晶体层和Ce-T-B基晶体层来形成R1-T-B基晶体层和Ce-T-B基晶体层的堆叠结构。 以这种方式，可以通过Ce-T-B类结晶层降低结晶温度，从而保持R1-T-B系晶体层的高磁各向异性场。

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：US20200020468A1

公开(公告)日：2020-01-16

申请号：US16465412

申请日：2017-11-30

Applicant: TDK CORPORATION

Inventor： Ryuji HASHIMOTO ,  Masashi ITO ,  Eiichiro FUKUCHI ,  Yuki NAGAMINE

IPC: H01F1/057 ,  C22C38/10

Abstract: To provide a rare earth permanent magnet having as a main phase a compound with a Nd5Fe17 crystalline structure having strong coercive force. A rare earth permanent magnet having as a main phase a compound with a Nd5Fe17 crystalline structure, wherein when the composition ratio of the rare earth permanent magnet is expressed as RaT(100-a-b)Cb, where R is one or more rare earth elements requiring Sm, and T is one or more transition metal elements requiring Fe or Fe and Co, a and b satisfy 18

公开(公告)号：US20150303744A1

公开(公告)日：2015-10-22

申请号：US14689862

申请日：2015-04-17

Applicant: TDK CORPORATION

Inventor： Ryuji HASHIMOTO ,  Yasushi ENOKIDO ,  Kenichi NISHIKAWA

IPC: H02K1/02 ,  H01F1/34

CPC classification number: H01F1/34 ,  C22C33/0278 ,  C22C38/005 ,  C22C2202/02 ,  H01F1/0577

Abstract: The present invention provides an R-T-B based permanent magnet suitable as a magnet with a variable magnetic force for a motor with variable magnetic flux, which has a high residual magnetic flux density, a low coercivity, and a magnetic force that can be reversibly varied by a small external magnetic field. A permanent magnet with a high residual magnetic flux density and a low coercivity that is suitable as a variable magnet for a motor with variable magnetic flux can be obtained, by selecting the rare earth elements consisting of one or more of Y, La and Ce for a predetermined amount of the rare earth element(s) R in the R-T-B based permanent magnet, and further adding a predetermined amount of the additive element(s) which is at least one of Al, Cu, Zr, Hf and Ti.

Abstract translation: 本发明提供一种适用于具有可变磁力的可变磁力的基于RTB的永磁体，其具有可变磁通量的电动机，其具有高的剩余磁通密度，低的矫顽力和可以由 小外磁场。 通过选择由Y，La和Ce中的一种或多种组成的稀土元素，可以获得具有高残留磁通密度和低矫顽力的永磁体，其适用于具有可变磁通量的电动机的可变磁体，用于 在RTB永磁体中预定量的稀土元素R，并且进一步添加预定量的作为Al，Cu，Zr，Hf和Ti中的至少一种的添加元素。

公开(公告)号：US20140320244A1

公开(公告)日：2014-10-30

申请号：US14257541

申请日：2014-04-21

Applicant: TDK CORPORATION

Inventor： Ryuji HASHIMOTO ,  Kenichi SUZUKI ,  Kyung-Kun 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 stacked structure of R1-T-B based crystallizing layer and (Y, La)-T-B based crystallizing layer can be formed by alternatively stacking R1-T-B and (Y, La)-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, La)-T-B based crystallizing layer can be obtained. Further, the lattice distortion in the total stacked structure is moderated by setting the rare earth elements in the (Y, La)-T-B based crystallizing layer as both of Y and La, and a high residual flux density can be obtained accordingly.

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，La）-T-B来形成R1-T-B系结晶层和（Y，La）-T-B系结晶层的层叠结构。 以这种方式，可以保持基于（Y，La）-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，通过将（Y，La）-T-B系结晶层中的稀土元素设定为Y和La两者，可以缓和总堆叠结构中的晶格畸变，并且可以相应地获得高剩余磁通密度。