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：US10790091B2

公开(公告)日：2020-09-29

申请号：US15703724

申请日：2017-09-13

Applicant: TDK CORPORATION

Inventor： Fumiaki Satoh ,  Takehisa Tamura ,  Yuma Hattori ,  Toru Onoue ,  Daisuke Himeta ,  Ken Morita ,  Takuto Okamoto

IPC: H01G4/35 ,  H01G4/232 ,  H01G4/30 ,  H01G4/12 ,  H01G2/06

Abstract: An element body includes first and second end surfaces opposing each other in a first direction, first and second side surfaces opposing each other in a second direction, and first and second principal surfaces opposing each other in a third direction. The length of the element body in the second direction is shorter than that of the element body in the first direction, and the length of the element body in the third direction is shorter than that of the element body in the second direction. A pair of first external electrodes is disposed at both ends of the element body in the first direction. A second external electrode is disposed on the element body and positioned between the pair of first external electrodes. The second external electrode includes a first conductor part disposed on the first side surface. A depression is formed in the first conductor part.

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：US11264171B2

公开(公告)日：2022-03-01

申请号：US16986712

申请日：2020-08-06

Applicant: TDK CORPORATION

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

IPC: H01G4/248 ,  H01G4/12 ,  H01G4/012 ,  H01G4/30

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 first region, a total area of voids in the first region is in a range of 5.0 to 36.0% of an area of the first region. In a cross-section along a thickness direction of the second region, a total area of voids in the second region is in the range of 5.0 to 36.0% of an area of the second region.

公开(公告)号：US11094465B2

公开(公告)日：2021-08-17

申请号：US16250609

申请日：2019-01-17

Applicant: TDK CORPORATION

Inventor： Shinya Onodera ,  Takehisa Tamura ,  Ken Morita

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

Abstract: An element body of a rectangular parallelepiped shape includes a principal surface arranged to constitute a mounting surface, a pair of side surfaces opposing each other and adjacent to the principal surface, and a pair of end surfaces opposing each other and adjacent to the principal surface and the pair of side surfaces. An external electrode includes a sintered metal layer disposed on an end portion of the element body, and a conductive resin layer including a portion positioned on the principal surface and a portion positioned on the sintered metal layer. An end edge of the sintered metal layer is positioned closer to the end surface than a maximum thickness position of the portion positioned on the principal surface. A thickness of the conductive resin layer gradually decreases from the maximum thickness position to the portion positioned on the sintered metal layer.

公开(公告)号：US10297390B2

公开(公告)日：2019-05-21

申请号：US15703632

申请日：2017-09-13

Applicant: TDK CORPORATION

Inventor： Fumiaki Satoh ,  Takehisa Tamura ,  Yuma Hattori ,  Toru Onoue ,  Daisuke Himeta ,  Ken Morita ,  Takuto Okamoto

IPC: H01G4/005 ,  H01G4/008 ,  H01G4/30 ,  H01G4/228 ,  H01G4/232 ,  H01G4/35 ,  H01G2/06 ,  H01G4/12

Abstract: An element body includes first and second end surfaces opposing each other in a first direction, first and second side surfaces opposing each other in a second direction, and first and second principal surfaces opposing each other in a third direction. The length of the element body in the third direction is shorter than that of the element body in the first direction and is shorter than that of the element body in the second direction. A pair of first external electrodes is disposed at both ends of the element body in the first direction. Each of the first external electrodes includes a first conductor part disposed on one main surface and a second conductor part disposed on the end surface and coupled to the first conductor part. The porosity of the first conductor part is smaller than that of the second conductor part.

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：US09984822B2

公开(公告)日：2018-05-29

申请号：US15270744

申请日：2016-09-20

Applicant: TDK CORPORATION

Inventor： Masahiro Iwama ,  Takehisa Tamura ,  Atsushi Sato ,  Tomonori Oi

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

CPC classification number: H01G4/232 ,  H01G4/008 ,  H01G4/12 ,  H01G4/2325 ,  H01G4/248 ,  H01G4/30

Abstract: An element body includes a first principal surface and a second principal surface opposing each other in a first direction. A first terminal electrode is disposed on the first principal surface side of the element body. A second terminal electrode is disposed on the second principal surface side of the element body. The first terminal electrode includes a first sintered metal layer formed on the first principal surface; and a first plating layer formed on the first sintered metal layer and including base metal. The second terminal electrode includes a second sintered metal layer formed on the second principal surface, a second plating layer formed on the second sintered metal layer and including base metal, and a solder layer formed on the second plating layer and including Sn and a metal having a higher melting point than the melting point of Sn.