Patents by Inventor Tomonaga Nishikawa

Tomonaga Nishikawa has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20220148796
    Abstract: Disclosed herein is a composite electronic component that includes: a first coil pattern formed on at least a first conductor layer, the first coil pattern having one end coupled to the first terminal electrode and other end coupled to the second terminal electrode; a second coil pattern formed on at least a second conductor layer; a third coil pattern formed on at least the first and second conductor layers, the third coil pattern having one end coupled to the one end of the second coil pattern and other end coupled to the third terminal electrode; and a fourth coil pattern formed on at least the first and second conductor layers, the fourth coil pattern having one end coupled to the other end of the second coil pattern and other end coupled to the fourth terminal electrode.
    Type: Application
    Filed: October 21, 2021
    Publication date: May 12, 2022
    Applicant: TDK CORPORATION
    Inventors: Tomonaga NISHIKAWA, Keigo Higashida, Masaki Yoneyama, Michitaka Okazaki, Masumi Kameda
  • Publication number: 20220102045
    Abstract: Disclosed herein is a coil component that includes a first conductor layer having first and third planar spiral coils and second conductor layer having second planar spiral coil. The first planar spiral coil is positioned on an outer peripheral side of the third planar spiral coil. The first planar spiral coil has a pattern width larger than that of the third planar spiral coil. The second planar spiral coil is offset to the third planar spiral coil side in a plan view.
    Type: Application
    Filed: September 27, 2021
    Publication date: March 31, 2022
    Inventors: Takeshi OKUMURA, Tomonaga NISHIKAWA, Kouji KAWAMURA, Hidenori TSUTSUI, Yosuke MIZUTANI, Hiroshi SAGAWA, Kenji TANAKA
  • Publication number: 20210280353
    Abstract: Disclosed herein is a coil component that includes a a coil area in which first to third coil patterns are disposed and a terminal area positioned outside the coil area. The outer peripheral end of the first coil pattern is connected to the first terminal electrode. The inner peripheral end of the first coil pattern is connected to an inner peripheral end of the second coil pattern. The outer peripheral end of the second coil pattern is connected to an outer peripheral end of the third coil pattern. A via conductor connecting the outer peripheral ends of the second and third coil patterns is disposed at a position overlapping the terminal area.
    Type: Application
    Filed: March 2, 2021
    Publication date: September 9, 2021
    Applicant: TDK CORPORATION
    Inventors: Masaki ENDO, Tomonaga NISHIKAWA, Masaki YONEYAMA, Liyi CHEN, Azuma SATOH
  • Patent number: 11087915
    Abstract: Disclosed herein is an electronic component that includes: a base having a main surface; a passive element part formed on the main surface of the base; a magnetic resin layer formed on the main surface of the base so as to embed the passive element part therein, the magnetic resin layer having a surface extending substantially parallel to the main surface of the base; an insulating coat layer formed on a first area of the surface of the magnetic resin layer, the insulating coat layer having higher smoothness than the surface of the magnetic resin layer; and a terminal electrode formed on a second area of the surface of the magnetic resin layer and electrically connected to the passive element part.
    Type: Grant
    Filed: August 10, 2018
    Date of Patent: August 10, 2021
    Assignee: TDK CORPORATION
    Inventors: Masahiro Nakajima, Kenichi Hirenzaki, Makoto Endo, Masanori Suzuki, Tomonaga Nishikawa
  • Publication number: 20210233698
    Abstract: A coil component includes spiral conductor patterns S1 and S2 and insulating resin layers that cover the spiral conductor patterns S1 and S2, respectively. An outermost turn of the spiral conductor pattern S1 has a widened part. As a result, an outer wall surface part constituting the outer wall surface of the outermost turn in the radial direction and an outer wall surface part constituting the outer wall surface of the outermost turn of the spiral conductor pattern S2 in the radial direction differ in radial position from each other. Overlap of the insulating resin layers in the lamination direction is reduced to suppress thermal expansion or contraction of the insulating resin layers in the lamination direction at the overlap. This can relieve a stress applied to the interface between the spiral conductor pattern and the insulating resin layer.
    Type: Application
    Filed: June 5, 2019
    Publication date: July 29, 2021
    Inventors: Nobuya TAKAHASHI, Naoaki FUJII, Tomonaga NISHIKAWA
  • Patent number: 11056268
    Abstract: A coil component includes a plurality of conductor layers constituted of a first conductor layer to a fourth conductor layer that includes a function layer and a coil layer wound around an axis center; and a covering portion that is formed of an insulative resin, integrally covers the plurality of conductor layers, and is interposed between conductor layers adjacent to each other. The coil layer and the function layer of the plurality of conductor layers have substantially the same shape in a plan view. The fourth conductor layer has a connection conductor layer connecting the coil layer and the function layer to each other. A conductor layer having no connection conductor layer among the plurality of conductor layers has a protrusion portion corresponding to the connection conductor layer at a position overlapping the connection conductor layer in a plan view.
    Type: Grant
    Filed: July 26, 2018
    Date of Patent: July 6, 2021
    Assignee: TDK CORPORATION
    Inventors: Masanori Suzuki, Kouji Kawamura, Naoaki Fujii, Manabu Yamatani, Tomonaga Nishikawa
  • Patent number: 10998126
    Abstract: Disclosed herein is a coil component that includes: a coil part in which a plurality of conductor layers and a plurality of interlayer insulting layers are alternately laminated, the coil part having a mounting surface substantially parallel to the lamination direction and an upper surface substantially parallel to the lamination direction and positioned on an opposite side to the mounting surface; and a direction mark comprising a conductive material that covers a part of the conductor layers exposed on the upper surface.
    Type: Grant
    Filed: June 5, 2018
    Date of Patent: May 4, 2021
    Assignee: TDK CORPORATION
    Inventors: Tomonaga Nishikawa, Tomokazu Ito, Manabu Yamatani, Masanori Suzuki, Ikuya Kokubo, Takuya Takeuchi
  • Publication number: 20210005377
    Abstract: A coil component includes: a first magnetic resin layer in a lower area; a second magnetic resin layer in an inner diameter area surrounded by a coil pattern, an outer peripheral area that surrounds the coil pattern, and an upper area; and an insulating gap layer between the first and second magnetic resin layers. A part of the insulating gap layer positioned between the first magnetic resin layer and a part of the second magnetic resin layer positioned in the inner diameter area is curved in the axial direction. A magnetic substrate need not be used. The insulating gap layer is provided, allowing the insulating gap layer to function as a magnetic gap. The insulating gap layer is curved in the axial direction, so that a contact area between the insulating gap layer and the first and second magnetic resin layers are increased to enhance adhesion therebetween.
    Type: Application
    Filed: August 10, 2018
    Publication date: January 7, 2021
    Inventors: Masanori SUZUKI, Yuuichi KAWAGUCHI, Naoaki FUJII, Tomonaga NISHIKAWA
  • Patent number: 10840010
    Abstract: Disclosed herein is a coil component that includes a coil part in which a plurality of conductor layers and a plurality of interlayer insulting layers are alternately laminated, and an external terminal. Each of the conductor layers has a coil conductor pattern and an electrode pattern exposed from the coil part. The electrode patterns are connected to each other through a plurality of via conductors penetrating the interlayer insulating layers. At least one of the interlayer insulating layers is exposed from the coil part positioned between the plurality of electrode patterns. The external terminal is formed on the electrode patterns exposed from the coil part so as to avoid an exposed part of the interlayer insulating layer.
    Type: Grant
    Filed: April 24, 2018
    Date of Patent: November 17, 2020
    Assignee: TDK CORPORATION
    Inventors: Naoaki Fujii, Tomonaga Nishikawa, Kouji Kawamura, Nobuya Takahashi
  • Publication number: 20200294711
    Abstract: Disclosed herein is a coil component that includes an element body having first and second magnetic layers and a coil part positioned therebetween, and first and second external terminals formed on the element body. The first external terminal is formed on the mounting surface and the first side surface. The second external terminal is formed on the mounting surface and the second side surface. The first and second external terminals formed on the first and second side surfaces, respectively, have a meander shape.
    Type: Application
    Filed: March 12, 2020
    Publication date: September 17, 2020
    Inventors: Tomonaga NISHIKAWA, Takeshi Okumura, Kouji Kawamura, Hidenori Tsutsui
  • Patent number: 10638611
    Abstract: Disclosed herein is a coil component that includes a first planar spiral conductor; a second planar spiral conductor laminated on the first planar spiral conductor and wound in an opposite direction to the first planar spiral conductor; a first external terminal electrically connected to an outer peripheral end of the first planar spiral conductor; a second external terminal electrically connected to an outer peripheral end of the second planar spiral conductor; and a third external terminal electrically connected in common to inner peripheral ends of the first and second planar spiral conductors.
    Type: Grant
    Filed: October 14, 2016
    Date of Patent: April 28, 2020
    Assignee: TDK CORPORATION
    Inventors: Tomonaga Nishikawa, Kouji Kawamura, Tomokazu Ito, Tadashi Watanabe, Mitsuhiko Endo, Fumio Watanabe
  • Patent number: 10546683
    Abstract: Disclosed herein is a coil component that includes a spiral conductor, a magnetic material layer covering the spiral conductor and having a through hole exposing an end of the spiral conductor, a through-hole conductor embedded in the through hole and has first region and second regions that are exposed from the magnetic material layer, a first conductor layer formed on an upper surface of the magnetic material layer and covering the first region of the through-hole conductor without covering the second region, and a second conductor layer covering the first conductor layer and the second region of the through-hole conductor, wherein the second conductor layer has a lower resistance than the first conductor layer.
    Type: Grant
    Filed: April 6, 2018
    Date of Patent: January 28, 2020
    Assignee: TDK CORPORATION
    Inventors: Tomonaga Nishikawa, Kouji Kawamura, Hidenori Tsutsui, Mitsuo Natori, Hitoshi Ozawa
  • Publication number: 20190326041
    Abstract: Disclosed herein is a coil component that includes: a magnetic element body containing magnetic powder, the magnetic element body having first and second surfaces; a coil conductor embedded in the magnetic element body; and an external terminal connected to the coil conductor and exposed on the first surface of the magnetic element body. The second surface of the magnetic element body is free from the external terminal. The first surface is greater in surface roughness than the second surface.
    Type: Application
    Filed: April 24, 2019
    Publication date: October 24, 2019
    Applicant: TDK CORPORATION
    Inventors: Yuuichi KAWAGUCHI, Masanori SUZUKI, Naoaki FUJII, Tomonaga NISHIKAWA
  • Publication number: 20190313528
    Abstract: Disclosed herein is a multilayer wiring structure that includes a first metal layer; an interlayer insulating film formed on the first metal layer, the interlayer insulating film having an opening that exposes a first area of the first metal layer; a second metal layer formed on an inner wall of the opening; and a third metal layer filling the opening via the second metal layer. The first and third metal layers are direct contact with each other at a bottom of the opening.
    Type: Application
    Filed: April 3, 2019
    Publication date: October 10, 2019
    Applicant: TDK Corporation
    Inventors: Hajime Kuwajima, Tomonaga Nishikawa, Takashi Ohtsuka, Takeshi Oohashi, Yuichiro Okuyama, Manabu Yamatani
  • Patent number: 10426032
    Abstract: Disclosed herein is a multilayer wiring structure that includes a first metal layer; an interlayer insulating film formed on the first metal layer, the interlayer insulating film having an opening that exposes a first area of the first metal layer; a second metal layer formed on an inner wall of the opening; and a third metal layer filling the opening via the second metal layer. The first and third metal layers are direct contact with each other at a bottom of the opening.
    Type: Grant
    Filed: April 3, 2019
    Date of Patent: September 24, 2019
    Assignee: TDK CORPORATION
    Inventors: Hajime Kuwajima, Tomonaga Nishikawa, Takashi Ohtsuka, Takeshi Oohashi, Yuichiro Okuyama, Manabu Yamatani
  • Patent number: 10418164
    Abstract: Disclosed herein is a coil component that includes first and second magnetic members; a coil layer arranged between the first and second magnetic members, the coil layer including a plurality of conductor layers and a plurality of non-magnetic insulating layers, the conductor layers and the non-magnetic insulating layers being alternately laminated, the conductor layers being connected to each other via through holes formed in the non-magnetic insulating layers to form a coil pattern; a first external terminal covering one end of the coil pattern exposed to at least one of side surfaces of the coil layer without covering the first and second magnetic members; and a second external terminal covering other end of the coil pattern exposed to at least one of the side surfaces of the coil layer without covering the first and second magnetic members.
    Type: Grant
    Filed: October 12, 2016
    Date of Patent: September 17, 2019
    Assignee: TDK CORPORATION
    Inventors: Tomonaga Nishikawa, Tomokazu Ito, Takeshi Okumura, Kouji Kawamura, Tadashi Watanabe, Hidenori Tsutsui
  • Publication number: 20190244750
    Abstract: A coil component is provided with a coil part in which a plurality of conductor layers and a plurality of interlayer insulating layers are alternately laminated; and a sealing resin layer that covers the coil part. The conductor layers each include a spiral pattern. The interlayer insulating layers each cover an upper surface and a side surface of the spiral pattern. The recessed part is formed in the side wall surface of the interlayer insulating layer. A part of the sealing resin layer is embedded in the recessed part.
    Type: Application
    Filed: February 1, 2019
    Publication date: August 8, 2019
    Applicant: TDK Corporation
    Inventors: Masanori SUZUKI, Manabu Yamatani, Takuya Takeuchi, Ikuya Kokubo, Tomonaga Nishikawa, Naoki Fujii, Nobuya Takahashi
  • Publication number: 20190066900
    Abstract: Disclosed herein is an electronic component that includes: a base having a main surface; a passive element part formed on the main surface of the base; a magnetic resin layer formed on the main surface of the base so as to embed the passive element part therein, the magnetic resin layer having a surface extending substantially parallel to the main surface of the base; an insulating coat layer formed on a first area of the surface of the magnetic resin layer, the insulating coat layer having higher smoothness than the surface of the magnetic resin layer; and a terminal electrode formed on a second area of the surface of the magnetic resin layer and electrically connected to the passive element part.
    Type: Application
    Filed: August 10, 2018
    Publication date: February 28, 2019
    Applicant: TDK CORPORATION
    Inventors: Masahiro NAKAJIMA, Kenichi HIRENZAKI, Makoto ENDO, Masanori SUZUKI, Tomonaga NISHIKAWA
  • Publication number: 20190035534
    Abstract: A coil component includes a plurality of conductor layers constituted of a first conductor layer to a fourth conductor layer that includes a function layer and a coil layer wound around an axis center; and a covering portion that is formed of an insulative resin, integrally covers the plurality of conductor layers, and is interposed between conductor layers adjacent to each other. The coil layer and the function layer of the plurality of conductor layers have substantially the same shape in a plan view. The fourth conductor layer has a connection conductor layer connecting the coil layer and the function layer to each other. A conductor layer having no connection conductor layer among the plurality of conductor layers has a protrusion portion corresponding to the connection conductor layer at a position overlapping the connection conductor layer in a plan view.
    Type: Application
    Filed: July 26, 2018
    Publication date: January 31, 2019
    Applicant: TDK CORPORATION
    Inventors: Masanori SUZUKI, Kouji KAWAMURA, Naoaki FUJII, Manabu YAMATANI, Tomonaga NISHIKAWA
  • Publication number: 20180358169
    Abstract: Disclosed herein is a coil component that includes: a coil part in which a plurality of conductor layers and a plurality of interlayer insulting layers are alternately laminated, the coil part having a mounting surface substantially parallel to the lamination direction and an upper surface substantially parallel to the lamination direction and positioned on an opposite side to the mounting surface; and a direction mark comprising a conductive material that covers a part of the conductor layers exposed on the upper surface.
    Type: Application
    Filed: June 5, 2018
    Publication date: December 13, 2018
    Applicant: TDK CORPORATION
    Inventors: Tomonaga NISHIKAWA, Tomokazu ITO, Manabu YAMATANI, Masanori SUZUKI, Ikuya KOKUBO, Takuya TAKEUCHI