Patents by Inventor Masazumi Arata

Masazumi Arata 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: 20200373061
    Abstract: In a coil component, a second magnetic portion disposed in the vicinity of a coil is designed to have a higher proportion of Fe than a metal magnetic powder-containing resin constituting a first magnetic portion. Therefore, a magnetic flux of the coil flows smoothly. Although the second magnetic portion has a relatively lower withstand voltage than the first magnetic portion, since the second magnetic portion is surrounded by the first magnetic portion, it is not exposed on an outer surface of a magnetic body. For this reason, a situation in which the coil and external terminal electrodes are short-circuited with the second magnetic portion therebetween is effectively curbed, and short-circuiting between the coil and the external terminal electrodes can be curbed.
    Type: Application
    Filed: May 19, 2020
    Publication date: November 26, 2020
    Applicant: TDK CORPORATION
    Inventors: Miyuki ASAI, Takahiro KAWAHARA, Masazumi ARATA, Hitoshi OHKUBO
  • Publication number: 20200373064
    Abstract: In a coil component, an uneven structure provided by an insulation layer and a resin wall contributes to extension of a contact area with respect to a magnetic body, so that an adhesive force with respect to the magnetic body is improved. In addition, the magnetic body protrudes downward toward an exposed region of the resin wall corresponding to a recessed portion in the uneven structure, a volume thereof is increased, and coil characteristics such as an inductance value are improved.
    Type: Application
    Filed: May 19, 2020
    Publication date: November 26, 2020
    Applicant: TDK CORPORATION
    Inventors: Miyuki ASAI, Hokuto EDA, Masazumi ARATA, Hitoshi OHKUBO
  • Publication number: 20200373050
    Abstract: In a coil component, an insulation layer covers an upper surface of a conductor pattern. Accordingly, insulating properties between the conductor pattern and a magnetic body are enhanced, and insulating properties between the conductor patterns are enhanced. In addition, in the coil component, the magnetic body enters a space between resin walls such that the insulation layer is covered. Therefore, a volume of the magnetic body above the conductor pattern is increased, and high coil characteristics are realized.
    Type: Application
    Filed: May 19, 2020
    Publication date: November 26, 2020
    Applicant: TDK CORPORATION
    Inventors: Miyuki ASAI, Hokuto EDA, Masazumi ARATA, Hitoshi OHKUBO
  • Publication number: 20200373077
    Abstract: An upper end portion and a lower end portion of a second magnetic portion of a coil component are further away from a coil than when a third part and a fifth part are not present. For this reason, a magnetic flux is unlikely to be concentrated in the upper end portion and the lower end portion of the second magnetic portion, so that magnetic saturation is unlikely to occur. Therefore, improvement of direct current superimposition characteristics is realized in the coil component.
    Type: Application
    Filed: May 19, 2020
    Publication date: November 26, 2020
    Applicant: TDK CORPORATION
    Inventors: Kenei ONUMA, Masazumi ARATA, Hitoshi OHKUBO
  • Patent number: 10847312
    Abstract: In a planar coil element, since an overlapping portion of a fourth resin wall of a first conductor pattern protrudes from an end surface of a main body portion, restriction on a width of the overlapping portion is relaxed, and the wide overlapping portion is realized. Therefore, an improvement in a withstand voltage between the second external terminal electrode formed on the end surface and an outermost turn of the first conductor pattern is realized. Similarly, regarding the second conductor pattern, the improvement in the withstand voltage between the first external terminal electrode formed on the end surface and an outermost turn of the second conductor pattern is realized.
    Type: Grant
    Filed: July 5, 2018
    Date of Patent: November 24, 2020
    Assignee: TDK CORPORATION
    Inventors: Hitoshi Ohkubo, Masazumi Arata, Takahiro Kawahara, Hokuto Eda, Hiroki Tsujiai
  • Publication number: 20200143980
    Abstract: A coil component in which a change in thicknesses of the winding part is prevented is provided. According to the coil component, since each of a pair of neighboring resin walls and a seed part between the pair of resin walls are separated by a predetermined distance, a plating part grown on the seed part is easy to grow uniformly between the pair of neighboring resin walls. For this reason, the winding part whose surface is gentle and in which a change in thickness is prevented is obtained by plating growth.
    Type: Application
    Filed: January 3, 2020
    Publication date: May 7, 2020
    Applicant: TDK CORPORATION
    Inventors: Hitoshi OHKUBO, Masazumi ARATA, Manabu OHTA, Yuuya KANAME, Yoshihiro MAEDA, Takahiro KAWAHARA, Hokuto EDA, Shigeki SATO
  • Publication number: 20200143979
    Abstract: In a coil component, a shield layer is provided after the unevenness of the surface of an element body is smoothened by the surface being covered with an insulating layer. A Cu layer of the shield layer is provided on a smooth surface, and thus a thickness variation can be suppressed and the Cu layer can be formed with a substantially uniform thickness. In the coil component, a point where the shield layer is thin or a point lacking the shield layer is unlikely to be generated and a functional degradation of the shield layer is effectively suppressed.
    Type: Application
    Filed: October 24, 2019
    Publication date: May 7, 2020
    Applicant: TDK CORPORATION
    Inventors: Hitoshi OHKUBO, Masazumi ARATA, Kenichi KAWABATA, Atsushi SATO
  • Patent number: 10559417
    Abstract: A coil component in which a change in thicknesses of the winding part is prevented is provided. According to the coil component, since each of a pair of neighboring resin walls and a seed part between the pair of resin walls are separated by a predetermined distance, a plating part grown on the seed part is easy to grow uniformly between the pair of neighboring resin walls. For this reason, the winding part whose surface is gentle and in which a change in thickness is prevented is obtained by plating growth.
    Type: Grant
    Filed: May 27, 2016
    Date of Patent: February 11, 2020
    Assignee: TDK CORPORATION
    Inventors: Hitoshi Ohkubo, Masazumi Arata, Manabu Ohta, Yuuya Kaname, Yoshihiro Maeda, Takahiro Kawahara, Hokuto Eda, Shigeki Sato
  • Publication number: 20190385792
    Abstract: In a coil component and a method for manufacturing the same, a winding part of a coil is grown by plating so as to extend between resin walls of a resin body provided before the coil is grown by plating. The resin wall is interposed between adjacent turns of the winding part of the coil during the plating growth, and therefore contact between adjacent turns of the winding part of the coil cannot occur.
    Type: Application
    Filed: August 29, 2019
    Publication date: December 19, 2019
    Inventors: Hitoshi OHKUBO, Masazumi ARATA, Manabu OHTA, Shou KAWADAHARA, Yoshihiro MAEDA, Takahiro KAWAHARA, Hokuto EDA, Shigeki SATO
  • Patent number: 10468184
    Abstract: In a coil component 1 and a method for manufacturing the same, a winding part of a coil is grown by plating so as to extend between resin walls of a resin body provided before the coil is grown by plating. The resin wall is interposed between adjacent turns of the winding part of the coil during the plating growth, and therefore contact between adjacent turns of the winding part of the coil cannot occur.
    Type: Grant
    Filed: November 24, 2015
    Date of Patent: November 5, 2019
    Assignee: TDK CORPORATION
    Inventors: Hitoshi Ohkubo, Masazumi Arata, Manabu Ohta, Shou Kawadahara, Yoshihiro Maeda, Takahiro Kawahara, Hokuto Eda, Shigeki Sato
  • Patent number: 10283247
    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.
    Type: Grant
    Filed: July 19, 2016
    Date of Patent: May 7, 2019
    Assignee: TDK CORPORATION
    Inventors: Yuusuke Nagai, Masazumi Arata, Kenji Komorita, Yoshimitsu Satoh
  • Patent number: 10210974
    Abstract: In a coil component (planar coil element), at least part of a third metal magnetic powder constituting a metal magnetic powder and having a minimum average grain diameter is uncoated, which suppresses a reduction in magnetic permeability. On the other hand, the remaining metal powders are coated with glass, which improves the insulating properties of a metal magnetic powder-containing resin and reduces core loss.
    Type: Grant
    Filed: November 25, 2015
    Date of Patent: February 19, 2019
    Assignee: TDK CORPORATION
    Inventors: Hitoshi Ohkubo, Masazumi Arata, Manabu Ohta, Shou Kawadahara, Yoshihiro Maeda, Takahiro Kawahara, Hokuto Eda, Shigeki Sato
  • Publication number: 20190013148
    Abstract: In a planar coil element, since an overlapping portion of a fourth resin wall of a first conductor pattern protrudes from an end surface of a main body portion, restriction on a width of the overlapping portion is relaxed, and the wide overlapping portion is realized. Therefore, an improvement in a withstand voltage between the second external terminal electrode formed on the end surface and an outermost turn of the first conductor pattern is realized. Similarly, regarding the second conductor pattern, the improvement in the withstand voltage between the first external terminal electrode formed on the end surface and an outermost turn of the second conductor pattern is realized.
    Type: Application
    Filed: July 5, 2018
    Publication date: January 10, 2019
    Applicant: TDK CORPORATION
    Inventors: Hitoshi OHKUBO, Masazumi ARATA, Takahiro KAWAHARA, Hokuto EDA, Hiroki TSUJIAI
  • Publication number: 20190013145
    Abstract: In a planar coil element, a dead space in a non-overlapping region is reduced by designing a total width of a first resin wall and a first turn located in the non-overlapping region to be narrow, more specifically, by designing the total width to be narrower than a total width of a second turn outside the first turn and a second resin wall located inside the turn and also than a total width of a third turn on the outer side and a third resin wall located inside the turn. As a result, a volume of a magnetic element body in a magnetic core portion of a coil can be increased, and an, inductance value, which is a magnetic characteristic, can also be improved.
    Type: Application
    Filed: July 5, 2018
    Publication date: January 10, 2019
    Applicant: TDK CORPORATION
    Inventors: Hitoshi OHKUBO, Masazumi ARATA, Takahiro KAWAHARA, Hokuto EDA, Hiroki TSUJIAI
  • Publication number: 20170025219
    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.
    Type: Application
    Filed: July 19, 2016
    Publication date: January 26, 2017
    Applicant: TDK CORPORATION
    Inventors: Yuusuke NAGAI, Masazumi ARATA, Kenji KOMORITA, Yoshimitsu SATOH
  • Publication number: 20160351316
    Abstract: A coil component in which a change in thicknesses of the winding part is prevented is provided. According to the coil component, since each of a pair of neighboring resin walls and a seed part between the pair of resin walls are separated by a predetermined distance, a plating part grown on the seed part is easy to grow uniformly between the pair of neighboring resin walls. For this reason, the winding part whose surface is gentle and in which a change in thickness is prevented is obtained by plating growth.
    Type: Application
    Filed: May 27, 2016
    Publication date: December 1, 2016
    Applicant: TDK CORPORATION
    Inventors: Hitoshi OHKUBO, Masazumi ARATA, Manabu OHTA, Yuuya KANAME, Yoshihiro MAEDA, Takahiro KAWAHARA, Hokuto EDA, Shigeki SATO
  • Publication number: 20160155550
    Abstract: In a coil component (planar coil element), at least part of a third metal magnetic powder constituting a metal magnetic powder and having a minimum average grain diameter is uncoated, which suppresses a reduction in magnetic permeability. On the other hand, the remaining metal powders are coated with glass, which improves the insulating properties of a metal magnetic powder-containing resin and reduces core loss.
    Type: Application
    Filed: November 25, 2015
    Publication date: June 2, 2016
    Applicant: TDK CORPORATION
    Inventors: Hitoshi OHKUBO, Masazumi ARATA, Manabu OHTA, Shou KAWADAHARA, Yoshihiro MAEDA, Takahiro KAWAHARA, Hokuto EDA, Shigeki SATO
  • Publication number: 20160155556
    Abstract: In a coil component 1 and a method for manufacturing the same, a winding part of a coil is grown by plating so as to extend between resin walls of a resin body provided before the coil is grown by plating. The resin wall is interposed between adjacent turns of the winding part of the coil during the plating growth, and therefore contact between adjacent turns of the winding part of the coil cannot occur.
    Type: Application
    Filed: November 24, 2015
    Publication date: June 2, 2016
    Inventors: Hitoshi OHKUBO, Masazumi ARATA, Manabu OHTA, Shou KAWADAHARA, Yoshihiro MAEDA, Takahiro KAWAHARA, Hokuto EDA, Shigeki SATO
  • Patent number: 8988180
    Abstract: A multilayer coil component has an element body, a coil, a pair of first external electrodes, a pair of second external electrodes, a first connection conductor, and a second connection conductor. The coil is composed of a plurality of internal conductors arranged in the element body and connected to each other. The first external electrodes are arranged on a first principal face of the element body. The second external electrodes are arranged on the first principal face. The first connection conductor is arranged between the coil and the first external electrodes in the element body and is connected to one end of the coil and to the first external electrodes. The second connection conductor is arranged between the coil and the second external electrodes in the element body and is connected to the other end of the coil and to the second external electrodes.
    Type: Grant
    Filed: February 1, 2013
    Date of Patent: March 24, 2015
    Assignee: TDK Corporation
    Inventors: Masazumi Arata, Yoji Tozawa, Takashi Endo, Toshiki Satoh, Takuya Kamei
  • Publication number: 20130257576
    Abstract: A multilayer coil component has an element body, a coil, a pair of first external electrodes, a pair of second external electrodes, a first connection conductor, and a second connection conductor. The coil is composed of a plurality of internal conductors arranged in the element body and connected to each other. The first external electrodes are arranged on a first principal face of the element body. The second external electrodes are arranged on the first principal face. The first connection conductor is arranged between the coil and the first external electrodes in the element body and is connected to one end of the coil and to the first external electrodes. The second connection conductor is arranged between the coil and the second external electrodes in the element body and is connected to the other end of the coil and to the second external electrodes.
    Type: Application
    Filed: February 1, 2013
    Publication date: October 3, 2013
    Applicant: TDK CORPORATION
    Inventors: Masazumi ARATA, Yoji TOZAWA, Takashi ENDO, Toshiki SATOH, Takuya KAMEI