公开(公告)号：US11217391B2

公开(公告)日：2022-01-04

申请号：US16819779

申请日：2020-03-16

Applicant: TDK CORPORATION

Inventor： Yuichi Nagai ,  Atsushi Takeda ,  Takehisa Tamura ,  Shinya Onodera

IPC: H01G4/005 ,  H01G4/30 ,  H01G4/12 ,  H05K3/34 ,  H01G4/232

Abstract: An electronic component includes an element body and an external electrode disposed on the element body. The element body includes a principal surface arranged to constitute a mounting surface and an end surface adjacent to the principal surface. The external electrode includes a conductive resin layer disposed to continuously cover a part of the principal surface and a part of the end surface, and a plating layer covering the conductive resin layer. The conductive resin layer includes a first region positioned on the end surface and a second region positioned on the principal surface. A maximum thickness of the second region is larger than a maximum thickness of the first region.

公开(公告)号：US10964479B2

公开(公告)日：2021-03-30

申请号：US16724441

申请日：2019-12-23

Applicant: TDK CORPORATION

Inventor： Shinya Onodera ,  Takehisa Tamura ,  Atsushi Takeda ,  Yuichi Nagai

IPC: H01G4/232 ,  H01G4/30 ,  H01G4/248 ,  H01G4/008 ,  H01G4/12

Abstract: An electronic component includes an element body and an external electrode disposed on the element body. The external electrode includes a sintered metal layer, a conductive resin layer disposed on the sintered metal layer, and a solder plating layer arranged to constitute an outermost layer of the external electrode. A space exists in the conductive resin layer or between the conductive resin layer and the sintered metal layer. A first maximum length of the space in a thickness direction of the conductive resin layer is shorter than a second maximum length of the space in a direction orthogonal to the thickness direction of the conductive resin layer.

公开(公告)号：US10755859B2

公开(公告)日：2020-08-25

申请号：US16189618

申请日：2018-11-13

Applicant: TDK CORPORATION

Inventor： Shinya Onodera ,  Takehisa Tamura ,  Ken Morita ,  Atsushi Takeda

IPC: H01G4/30 ,  H01G4/232 ,  H01G4/12 ,  H01G4/008 ,  H01G4/005

Abstract: An element body of a rectangular parallelepiped shape includes a pair of principal surfaces opposing each other in a first direction, a pair of side surfaces opposing each other in a second direction, and a pair of end surfaces opposing each other in a third direction. An external electrode disposed on an end portion of the element body in the third direction. When viewed from the third direction, a width of the element body in the second direction is the largest at a central position in the first direction, and gradually decreases from the central portion in the first direction. When viewed from the third direction, a position in which a length from one end to another end of the conductive resin layer in the second direction is the largest is located closer to the one principal surface than the central position.

公开(公告)号：US11289271B2

公开(公告)日：2022-03-29

申请号：US16986588

申请日：2020-08-06

Applicant: TDK CORPORATION

Inventor： Yuichi Nagai ,  Takehisa Tamura ,  Shinya Onodera ,  Ken Morita ,  Atsushi Takeda

IPC: H01G4/008 ,  H01G4/30 ,  H01G4/232

Abstract: A conductive resin layer includes a first region positioned on the end surface, a second region positioned on the side surface, and a third region positioned on a ridge portion between the end surface and the side surface. In a case where a maximum thickness of the first region is T1 (μm) and a maximum thickness of the second region is T2 (μm), the maximum thickness T1 and the maximum thickness T2 satisfy a relation of T2/T1≥0.11. In a cross-section along a thickness direction of the third region, a total area of the voids in the third region is in a range of 3.0 to 11.0% of an area of the third region.

公开(公告)号：US10763042B2

公开(公告)日：2020-09-01

申请号：US16166493

申请日：2018-10-22

Applicant: TDK CORPORATION

Inventor： Shinya Onodera ,  Takehisa Tamura ,  Atsushi Takeda ,  Ken Morita

IPC: H01G4/232 ,  H01G4/012 ,  H01G4/30 ,  H01G4/252 ,  H01L41/047 ,  H01G2/06 ,  H01G4/12 ,  H01G4/248 ,  H01F27/29 ,  H01C7/00 ,  H01F17/00 ,  H01C7/18 ,  H01C1/148

Abstract: An element body of a rectangular parallelepiped shape includes a first principal surface arranged to constitute a mounting surface, a second principal surface opposing the first principal surface in a first direction, a pair of side surfaces opposing each other in a second direction, and a pair of end surfaces opposing each other in a third direction. An external electrode is disposed at an end portion of the element body in the third direction. A first length of the element body in the first direction is different from a second length of the element body in the second direction. The external electrode includes a conductive resin layer. The conductive resin layer continuously covers one part of the first principal surface, one part of the end surface, and one part of each of the pair of side surfaces.

公开(公告)号：US09892855B2

公开(公告)日：2018-02-13

申请号：US15275953

申请日：2016-09-26

Applicant: TDK CORPORATION

Inventor： Norihisa Ando ,  Atsushi Takeda ,  Hideki Kaneko ,  Yui Sugiura ,  Tatsuo Inagaki ,  Tomomichi Gunji ,  Kouhei Yamaguchi

IPC: H01G4/30 ,  H01G4/005 ,  H01G4/232 ,  H01G4/248 ,  H01G4/12

CPC classification number: H01G4/30 ,  H01G4/005 ,  H01G4/12 ,  H01G4/232 ,  H01G4/2325 ,  H01G4/248

Abstract: An external electrode includes a sintered metal layer disposed on at least an end surface and a conductive resin layer disposed on the sintered metal layer. The sintered metal layer includes a first portion, a second portion, and a third portion. The first portion is disposed at a central region of the end surface. The second portion is disposed at a part of a peripheral region of the end surface, and extends to an edge portion of the end surface from the first portion. The third portion is disposed at a remaining part of the peripheral region of the end surface. The thickness of the second portion is less than that of the first portion. The thickness of the third portion is less than that of the second portion. The first portion, the second portion, and the third portion are covered with the conductive resin layer.

公开(公告)号：US12293874B2

公开(公告)日：2025-05-06

申请号：US17939819

申请日：2022-09-07

Applicant: TDK CORPORATION

Inventor： Yuichi Nagai ,  Natsumi Kato ,  Akitoshi Yoshii ,  Ken Morita ,  Takehisa Tamura ,  Atsushi Takeda

IPC: H01G4/012 ,  H01G4/232 ,  H01G4/30

Abstract: Each of a plurality of internal electrodes is electrically connected to a corresponding external electrode of a plurality of external electrodes. A plurality of auxiliary internal electrodes are disposed in the same layer as the plurality of internal electrodes to be located between each of a pair of side surfaces and the plurality of internal electrodes. Each of the plurality of external electrodes includes a pair of side surface electrode portions disposed on the pair of side surfaces and including a conductive resin layer. Each of the plurality of auxiliary internal electrodes is electrically connected to the external electrode to which the internal electrode located in the same layer is not electrically connected, and is located between the conductive resin layer to which the internal electrode located in the same layer is not electrically connected and the internal electrode located in the same layer.

公开(公告)号：US10573461B2

公开(公告)日：2020-02-25

申请号：US16119249

申请日：2018-08-31

Applicant: TDK CORPORATION

Inventor： Shinya Onodera ,  Takehisa Tamura ,  Atsushi Takeda ,  Ken Morita

IPC: H01G4/232 ,  H01G4/248 ,  H01G4/30 ,  H05K1/02 ,  H05K1/11 ,  H05K1/18 ,  H01G4/12 ,  H05K3/34

Abstract: An element body of a rectangular parallelepiped shape includes a first principal surface arranged to constitute a mounting surface, a second principal surface opposing the first principal surface in a first direction, a pair of side surfaces opposing each other in a second direction, and a pair of end surfaces opposing each other in a third direction. An external electrode is disposed at an end portion of the element body in the third direction. The external electrode includes a conductive resin layer. The conductive resin layer covers a region near the first principal surface of the end surface. A height of the conductive resin layer in the first direction is larger at an end portion in the second direction than at a center in the second direction, when viewed from the third direction.

公开(公告)号：US10032559B2

公开(公告)日：2018-07-24

申请号：US15389181

申请日：2016-12-22

Applicant: TDK CORPORATION

Inventor： Norihisa Ando ,  Atsushi Takeda ,  Hideki Kaneko

IPC: H01G4/232 ,  H01G4/30 ,  H01G4/12

Abstract: An electronic component is provided with an element body and terminal electrodes. The terminal electrodes include sintered metal layers and conductive resin layers. A first length, which is a length of the sintered metal layers in a first direction at end portions of a side surface in a second direction, is shorter than a second length, which is a length of the sintered metal layers in the first direction at central portions of the side surface in the second direction. A third length, which is a length of the conductive resin layers in the first direction at the end portions, is shorter than a fourth length, which is a length of the conductive resin layers in the first direction at the central portions. A difference between the fourth length and the third length is larger than a difference between the second length and the first length.

公开(公告)号：US10026556B2

公开(公告)日：2018-07-17

申请号：US15276172

申请日：2016-09-26

Applicant: TDK CORPORATION

Inventor： Norihisa Ando ,  Atsushi Takeda ,  Hideki Kaneko

IPC: H01G4/30 ,  H01G4/005 ,  H01G4/228 ,  H01G4/232 ,  H01G4/12

Abstract: An electronic component includes an element body having a pair of end surfaces opposing each other and a side surface adjacent to the pair of end surfaces, and an external electrode disposed on at least the end surface. The external electrode includes a conductive resin layer located on at least the end surface. A first thickness of the conductive resin layer located on a central region of the end surface is greater than a second thickness of the conductive resin layer located on a peripheral region of the end surface.