公开(公告)号：US20220310312A1

公开(公告)日：2022-09-29

申请号：US17698561

申请日：2022-03-18

Applicant: TDK CORPORATION

Inventor： Akihiko OIDE ,  Makoto YOSHINO ,  Tomoki OKADA ,  Hideki SAITOU ,  Seiji OSADA ,  Kazuhiro EBINA ,  Kunio ODA ,  Takashi ABE ,  Akio SHIBATA ,  Kazuo IWAI

IPC: H01F27/29 ,  H01F27/28

Abstract: In the multi-layer coil component, the lead conductor is exposed from the end surface of the element body and is connected to the external electrode provided on the end surface. When the lead conductor is led out to the end surface of the element body, the lead area can be easily increased as compared with the case where the lead conductor is led out to the side surface of the element body. Therefore, by connecting the coil and the external electrode via the lead conductor, high connectivity between the coil and the external electrode is achieved.

公开(公告)号：US20220108836A1

公开(公告)日：2022-04-07

申请号：US17490893

申请日：2021-09-30

Applicant: TDK CORPORATION

Inventor： Yusuke NAGAI ,  Takashi SUZUKI ,  Kazuhiro EBINA ,  Kunihiko KAWASAKI ,  Shinichi KONDO ,  Keito YASUDA ,  Ryuichi WADA ,  Makoto MORITA ,  Takashi KUDO ,  Kyohei TONOYAMA

IPC: H01F27/29 ,  H01F17/00 ,  H01F17/04

Abstract: In a multilayer coil component, a part filled with a resin and a void part not filled with the resin exist between a plurality of metal magnetic particles in an element body, one main surface of the element body is a mounting surface with respect to an external electronic component, and the edge of an external electrode is positioned on the mounting surface. In the element body, a high void region where the porosity caused by the void part is higher than the porosity of the other part in the element body extends from the edge of the external electrode on the mounting surface toward an end surface of the element body.

公开(公告)号：US20220102038A1

公开(公告)日：2022-03-31

申请号：US17486258

申请日：2021-09-27

Applicant: TDK CORPORATION

Inventor： Yusuke NAGAI ,  Takashi SUZUKI ,  Kazuhiro EBINA ,  Kouichi KAKUDA ,  Kunihiko KAWASAKI ,  Shinichi KONDO ,  Shinichi SATO ,  Seiichi NAKAGAWA ,  Mitsuharu KOIKE ,  Kazuhiro MIURA

IPC: H01F1/28 ,  H01F5/00

Abstract: A multilayer coil component includes an element body containing a plurality of metal magnetic particles and a resin existing between the plurality of metal magnetic particles and a coil disposed in the element body and configured to include a plurality of electrically interconnected coil conductors. At least one of the plurality of coil conductors has a spiral shape and has conductor portions adjacent to each other when viewed from a direction along a coil axis of the coil. The conductor portion includes a straight conductor portion extending in a straight line and a connecting conductor portion connecting the straight conductor portion and constituting a corner portion of the coil conductor. The metal magnetic particles between the connecting conductor portions adjacent to each other are lower in density than the metal magnetic particles between the straight conductor portions adjacent to each other.

公开(公告)号：US20240079177A1

公开(公告)日：2024-03-07

申请号：US18359419

申请日：2023-07-26

Applicant: TDK CORPORATION

Inventor： Yusuke NAGAI ,  Kazuhiro EBINA ,  Takahiro SATO ,  Masaki TAKAHASHI ,  Takashi ENDO ,  Yuya ISHIMA ,  Kosuke ITO ,  Takuya MIYASHITA

IPC: H01F27/29 ,  H01F17/00

CPC classification number: H01F27/292 ,  H01F17/0013 ,  H01F2017/0066

Abstract: A multilayer coil component includes an element body, a plurality of coil conductors, a first resistive layer, and a second resistive layer. The plurality of coil conductors are disposed in the element body and electrically connected to each other. The plurality of coil conductors include a first coil conductor and a second coil conductor adjacent to each other. The first resistive layer and the second resistive layer oppose each other between the first coil conductor and the second coil conductor. The first resistive layer is in contact with the first coil conductor.

公开(公告)号：US20230223183A1

公开(公告)日：2023-07-13

申请号：US18082689

申请日：2022-12-16

Applicant: TDK CORPORATION

Inventor： Yusuke NAGAI ,  Kazuhiro EBINA ,  Kunihiko KAWASAKI ,  Shinichi KONDO ,  Shinichi SATO ,  Seiichi NAKAGAWA ,  Mitsuharu KOIKE ,  Takato SASAKI ,  Youhei IIDA

IPC: H01F27/29 ,  H01F27/255 ,  H01F27/28

CPC classification number: H01F27/29 ,  H01F27/255 ,  H01F27/2804 ,  H01F2027/2809

Abstract: The coil component includes an element body, a coil, a first electrode part and a second electrode part. The element body includes a main surface to be used as a mounting surface. The coil is disposed in the element body. The first electrode part and the second electrode part are spaced apart from each other in a first direction, embedded in the element body in such a way as to be exposed from the main surface, and electrically connected to the coil. The first electrode part includes a first surface exposed from the main surface and a protrusion disposed in the element body in such a way as to be spaced apart from the main surface. The protrusion protrudes more toward the second electrode part than the first surface in the first direction.

公开(公告)号：US20220301761A1

公开(公告)日：2022-09-22

申请号：US17693810

申请日：2022-03-14

Applicant: TDK CORPORATION

Inventor： Akihiko OIDE ,  Makoto YOSHINO ,  Tomoki OKADA ,  Masashi SHIMOYASU ,  Daiki KATO ,  Hideki SAITOU ,  Seiji OSADA ,  Kazuhiro EBINA

IPC: H01F27/28 ,  H01F27/29 ,  H01F41/04 ,  H01F17/00

Abstract: In the multi-layer inductor, a through conductor provided in a sintered element body includes a pair of extracting conductors and a pair of internal conductors, and an end portion of the extracting conductor and an end portion of the internal conductor overlap each other in a stacking direction of the element body. Thus, the amount of shrinkage of each conductor during sintering of the element body is reduced, and internal stress generated in the element body after sintering is prevented.

公开(公告)号：US20220102039A1

公开(公告)日：2022-03-31

申请号：US17486640

申请日：2021-09-27

Applicant: TDK CORPORATION

Inventor： Yusuke NAGAI ,  Takashi SUZUKI ,  Kazuhiro EBINA ,  Kouichi KAKUDA ,  Kunihiko KAWASAKI ,  Shinichi KONDO ,  Shinichi SATO ,  Seiichi NAKAGAWA ,  Mitsuharu KOIKE ,  Kazuhiro MIURA

IPC: H01F1/28 ,  H01F27/28

Abstract: A multilayer coil component includes an element body containing a plurality of metal magnetic particles and a resin existing between the plurality of metal magnetic particles and a coil configured to include a plurality of electrically interconnected coil conductors. At least one of the plurality of coil conductors has a spiral shape and has conductor portions adjacent to each other when viewed from a direction along a coil axis of the coil. The plurality of metal magnetic particles contained in the element body include a plurality of metal magnetic particles having a particle diameter of ⅓ or more and ½ or less of a distance between the conductor portions adjacent to each other in the coil conductor. The metal magnetic particles having the particle diameter are arranged along a facing direction of the conductor portions between the conductor portions adjacent to each other in the coil conductor.

公开(公告)号：US20230230742A1

公开(公告)日：2023-07-20

申请号：US18085983

申请日：2022-12-21

Applicant: TDK CORPORATION

Inventor： Yusuke NAGAI ,  Kazuhiro EBINA ,  Kunihiko KAWASAKI ,  Shinichi KONDO ,  Yuya ISHIMA ,  Shinichi SATO ,  Seiichi NAKAGAWA ,  Kosuke ITO ,  Keito YASUDA ,  Youhei IIDA

IPC: H01F17/00 ,  H01F27/29 ,  H01F27/02 ,  H01F1/36

CPC classification number: H01F17/0013 ,  H01F27/292 ,  H01F27/022 ,  H01F1/36

Abstract: A multilayer coil component includes an element body including an end surface, a coil disposed in the element body, and an external electrode disposed on an end portion of the element body and connected to the coil. The external electrode includes a conductive resin layer. The conductive resin layer includes resin and a plurality of metal particles and is in contact with the end surface. The conductive resin layer includes a metal particle group. The metal particle group consists a plurality of first metal particles included in the plurality of metal particles, and the plurality of first metal particles is adjacent to the end surface and separated from the end surface.

公开(公告)号：US20230215616A1

公开(公告)日：2023-07-06

申请号：US18090240

申请日：2022-12-28

Applicant: TDK CORPORATION

Inventor： Yusuke NAGAI ,  Kazuhiro EBINA ,  Kunihiko KAWASAKI ,  Shinichi KONDO ,  Yuya ISHIMA ,  Shinichi SATO ,  Kosuke ITO

IPC: H01F27/29 ,  H01F17/00 ,  H01F1/24

CPC classification number: H01F27/292 ,  H01F17/0013 ,  H01F1/24

Abstract: A coil component includes: an element body; a coil including a plurality of coil conductors disposed in the element body and electrically connected to each other; an external electrode disposed on the element body; and a connection conductor that connects the coil and the external electrode. The connection conductor has an end portion exposed from an outer surface of the element body and connected to the external electrode. The end portion has a shape extending outward over an entire circumference.

公开(公告)号：US20230005656A1

公开(公告)日：2023-01-05

申请号：US17945396

申请日：2022-09-15

Applicant: TDK CORPORATION

Inventor： Shinichi SATO ,  Yohei TADAKI ,  Akihiko OIDE ,  Yuma ISHIKAWA ,  Hidekazu SATO ,  Kazuhiro EBINA ,  Hiroyuki TANOUE

IPC: H01F27/28 ,  H01F17/00 ,  H01F27/29 ,  H01F27/32 ,  H01F41/04 ,  H01F41/12

Abstract: An electronic component includes: an element body in which a plurality of insulator layers are stacked; a coil in which a plurality of inner conductors installed in the element body are electrically connected to each other; and an outer electrode that is disposed on an outer surface of the element body, is electrically connected to the coil, and includes at least a baked electrode layer. The inner conductor connected to the outer electrode includes a connection conductor that electrically connects the baked electrode layer to the inner conductor. The connection conductor includes a protruding portion that protrudes from the outer surface of the element body to the outer electrode. The protruding portion includes a metal having a smaller diffusion coefficient than a metal of a main component included in the baked electrode layer. The inner conductors have a lower electric resistance value than the metal included in the protruding portion.