公开(公告)号：US20170025219A1

公开(公告)日：2017-01-26

申请号：US15213962

申请日：2016-07-19

Applicant: TDK CORPORATION

Inventor： Yuusuke NAGAI ,  Masazumi ARATA ,  Kenji KOMORITA ,  Yoshimitsu SATOH

IPC: H01F27/28

CPC classification number: H01F17/0013 ,  H01F2017/002

Abstract: In a multilayer coil component, even when both pairs of ends of a first coil part and a second coil part are located at the same positions when viewed from the laminated direction and have the same shapes, a connecting part is connected only to a second end of the first coil part on the upper side in the laminated direction, and is connected only to a first end of the second coil part on the lower side in the laminated direction. Thus, a coil wound around along the laminated direction is structured without misaligning the positions of respective connecting parts. Consequently, the entire shapes of the respective coil parts can be designed to be the exact same shape, which makes it possible to reduce the number of types of coil part, saving labor and time for preparing many types of conductor patterns like the conventional type.

Abstract translation: 在多层线圈部件中，即使当从层叠方向观察时第一线圈部和第二线圈部的两对端位于相同的位置并且具有相同的形状，连接部仅连接到第二端 的第一线圈部分在层叠方向上的上侧，并且仅在层叠方向的下侧仅连接到第二线圈部的第一端。 因此，沿着层叠方向缠绕的线圈被构造成不对准各连接部的位置。 因此，各线圈部件的整体形状可以被设计成完全相同的形状，这使得可以减少线圈部件的数量，节省了用于制备诸如常规类型的许多类型导体图案的人力和时间。

公开(公告)号：US20220310316A1

公开(公告)日：2022-09-29

申请号：US17705969

申请日：2022-03-28

Applicant: TDK CORPORATION

Inventor： Yuya OSHIMA ,  Kenji KOMORITA ,  Masayuki SUZUKI ,  Yuudai KATOU ,  Takeru SASAKI ,  Shigeshi OSAWA ,  Takehiro ISHII ,  Kouichi KAKUDA ,  Yukio TAKAHASHI ,  Tsubasa OZAWA ,  Makoto YOSHINO

IPC: H01F27/29 ,  H01F17/00

Abstract: In the multi-layer coil component, the hole portion is provided in the vicinity of the side surface of the element body, and the distance from the tip position of the external electrode to the hole portion is shorter than the distance from the tip position of the external electrode to the coil. Therefore, when a crack is generated starting from the tip position of the external electrode on the mounting surface, the crack progress toward the hole portion located at a distance closer than the coil. Therefore, in the multi-layer coil component, splitting of the coil due to the crack can be prevented.

公开(公告)号：US20240242883A1

公开(公告)日：2024-07-18

申请号：US18410188

申请日：2024-01-11

Applicant: TDK Corporation

Inventor： Yuya ISHIMA ,  Kenji KOMORITA ,  Shingo HATTORI ,  Yoji TOZAWA ,  Masaki TAKAHASHI ,  Hidenobu UMEDA ,  Yusuke NAGAI ,  Akihiko OIDE

IPC: H01F41/076 ,  H01F41/12

CPC classification number: H01F41/076 ,  H01F41/122

Abstract: A method for manufacturing a coil component including an element body, and a coil disposed inside the element body and including a first coil conductor and a second coil conductor having different shapes, the method comprises: applying a first photosensitive conductive paste on a substrate and exposing the first photosensitive conductive paste to light with a pattern corresponding to the first coil conductor to form a first curing pattern; after the forming of the first curing pattern, applying a second photosensitive conductive paste on the first photosensitive conductive paste and exposing the second photosensitive conductive paste to light with a pattern corresponding to the second coil conductor to form a second curing pattern; after the forming of the second curing pattern, developing portions of the first photosensitive conductive paste and the second photosensitive conductive paste that were not exposed; and after the developing, adding an insulating material on the substrate.

公开(公告)号：US20200243239A1

公开(公告)日：2020-07-30

申请号：US16727553

申请日：2019-12-26

Applicant: TDK CORPORATION

Inventor： Takeshi SHIBAYAMA ,  Takashi SUZUKI ,  Takahiro SATO ,  Kenji KOMORITA ,  Tatsuro SUZUKI ,  Yukio TAKAHASHI ,  Hiroyuki TANOUE ,  Yasuhiro ITO

IPC: H01F1/34 ,  C04B35/26

Abstract: A ferrite composition includes a main component and a sub-component. The main component includes 10.0 to 38.0 mol % of a Fe compound in terms of Fe2O3, 3.0 to 11.0 mol % of a Cu compound in terms of CuO, 39.0 to 80.0 mol % (excluding 39.0 mol %) of a Zn compound in terms of ZnO, and a balance of a Ni compound. The sub-component includes 10.0 to 23.0 parts by weight of a Si compound in terms of SiO2, 0 to 3.0 parts by weight (including 0 parts by weight) of a Co compound in terms of Co3O4, and 0.1 to 3.0 parts by weight of a Bi compound in terms of Bi2O3 with respect to 100 parts by weight of the main component.

公开(公告)号：US20230402211A1

公开(公告)日：2023-12-14

申请号：US18330073

申请日：2023-06-06

Applicant: TDK CORPORATION

Inventor： Kouichi KAKUDA ,  Yuya OSHIMA ,  Kenji KOMORITA ,  Shigeshi OSAWA ,  Shinichi KONDO ,  Hiroyuki TANOUE ,  Kaori SASAKI ,  Takuya NIIBORI ,  Yukio TAKAHASHI ,  Hidenobu UMEDA

IPC: H01F1/34 ,  C04B35/26

CPC classification number: H01F1/344 ,  C04B35/265 ,  C04B2235/3274 ,  C04B2235/3293 ,  C04B2235/3277 ,  C04B2235/3298

Abstract: A ferrite composition includes a main component and a sub component. The main component includes an iron oxide in terms of Fe2O3, a copper oxide in terms of CuO, a zinc oxide in terms of ZnO, and a nickel oxide as its remainder. The sub component includes a cobalt oxide in terms of Co3O4, a tin oxide in terms of SnO2, and a bismuth oxide in terms of Bi2O3. A is −3.5 or more and 1.0 or less, provided that A=(α−18)/β; is defined, in which α is an amount of the zinc oxide represented by mol % in terms of ZnO in the main component, and β is an amount of the cobalt oxide represented by parts by weight in terms of Co3O4 with respect to 100 parts by weight of the main component.

公开(公告)号：US20230170117A1

公开(公告)日：2023-06-01

申请号：US17992292

申请日：2022-11-22

Applicant: TDK CORPORATION

Inventor： Yuya OSHIMA ,  Kenji KOMORITA ,  Takehiro ISHII ,  Kouichi KAKUDA ,  Shigeshi OSAWA ,  Yusaku ABE ,  Tsubasa OZAWA ,  Midori KISHIMOTO ,  Makoto YOSHINO ,  Koki ITO ,  Masato KUDOU

IPC: H01F5/00 ,  H01F5/04

CPC classification number: H01F5/003 ,  H01F5/04

Abstract: In a multilayer coil component, a plurality of coil conductors are stacked in a coil axis direction. A connecting conductor connects the coil conductors adjacent to each other in the coil axis direction. First, second, and third coil conductors are arranged in order in the coil axis direction. A main body portion extends in a circumferential direction of the coil axis. Pad portions are connected to the main body portion, are connected to the first coil conductor via the connecting conductor, overhang from the third coil conductor in a direction away from the coil axis when viewed from the coil axis direction, and are inclined with respect to a virtual plane orthogonal to the coil axis direction.

公开(公告)号：US20230420172A1

公开(公告)日：2023-12-28

申请号：US18367503

申请日：2023-09-13

Applicant: TDK CORPORATION

Inventor： Hidekazu SATO ,  Takahiro SATO ,  Hitoshi KUDO ,  Takashi ENDO ,  Yusuke NAGAI ,  Tatsuro SUZUKI ,  Hiroko KORIKAWA ,  Kenji KOMORITA

IPC: H01F17/00 ,  H01F17/04 ,  H01F41/04 ,  H01F27/28 ,  H01F5/00 ,  H01F27/29

CPC classification number: H01F17/0013 ,  H01F17/04 ,  H01F41/046 ,  H01F27/2804 ,  H01F5/003 ,  H01F27/292

Abstract: A multilayer coil component includes an element body having a multilayer structure including a first element body portion formed of a ferrite element body material, and a second element body portion laminated on the first element body portion and formed of a ferrite element body material having a composition different from the ferrite element body material forming the first element body portion, a multilayer coil having an axis parallel to a lamination direction of the element body, and a stress alleviation portion provided in an inner region of the multilayer coil when viewed from the lamination direction. In the multilayer coil component, the stress alleviation portion is provided in the inner region of the multilayer coil in which a stress tends to be concentrated to alleviate the stress in the inner region of the multilayer coil, and thereby occurrence of cracking in the element body can be suppressed.

公开(公告)号：US20180218829A1

公开(公告)日：2018-08-02

申请号：US15419522

申请日：2017-01-30

Applicant: TDK CORPORATION

Inventor： Takashi ENDO ,  Kenji KOMORITA ,  Kunihiko KAWASAKI ,  Hidekazu SATO ,  Takashi SUZUKI

IPC: H01F27/28

CPC classification number: H01F17/0033 ,  H01F17/0013 ,  H01F2017/0066

Abstract: A multilayer coil component includes an element body, a coil including a plurality of internal conductors, and a plurality of stress-relaxation spaces. The plurality of internal conductors are separated from each other in a first direction in the element body. Each stress-relaxation space is in contact with a surface of the corresponding internal conductor and powders exist in each stress-relaxation space. The element body includes element body regions located between the internal conductors adjacent to each other in the first direction. Each stress-relaxation space includes a first boundary surface with each internal conductor and a second boundary surface with each element body region. The first boundary surface and the second boundary surface oppose each other in the first direction. A distance between the first boundary surface and the second boundary surface is smaller than a thickness of each element body region in the first direction.