Patents by Inventor Keiko SHIROKI

Keiko SHIROKI 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).

  • Patent number: 11515079
    Abstract: One object is to suppress thermal shrinkage of a cover resin layer at the time of thermal curing. A laminated coil according to one embodiment of the present invention is provided with a magnetic substrate formed of a sintered magnetic material, an insulation resin layer formed on the magnetic substrate, a cover resin layer formed on the insulation resin layer, and a coil conductor embedded in the insulation resin layer. In one embodiment of the present invention, said insulation resin layer includes a first resin and first filler particles, and said cover resin layer includes a second resin and second filler particles. A filling factor of the second filler particles in the cover resin layer is higher than a filling factor of the first filler particles in the insulation resin layer.
    Type: Grant
    Filed: July 13, 2017
    Date of Patent: November 29, 2022
    Assignee: Taiyo Yuden Co., Ltd.
    Inventors: Takashi Nakajima, Keiko Shiroki
  • Publication number: 20180033544
    Abstract: One object is to suppress thermal shrinkage of a cover resin layer at the time of thermal curing. A laminated coil according to one embodiment of the present invention is provided with a magnetic substrate formed of a sintered magnetic material, an insulation resin layer formed on the magnetic substrate, a cover resin layer formed on the insulation resin layer, and a coil conductor embedded in the insulation resin layer. In one embodiment of the present invention, said insulation resin layer includes a first resin and first filler particles, and said cover resin layer includes a second resin and second filler particles. A filling factor of the second filler particles in the cover resin layer is higher than a filling factor of the first filler particles in the insulation resin layer.
    Type: Application
    Filed: July 13, 2017
    Publication date: February 1, 2018
    Inventors: Takashi NAKAJIMA, Keiko SHIROKI
  • Patent number: 9093213
    Abstract: A common mode choke coil exhibiting greater reliability against moisture load includes a nonmagnetic layer made of glass, magnetic layers placed in a manner sandwiching the nonmagnetic layer, and two or more coil conductors embedded in a base material constituted by the nonmagnetic layer and magnetic layers, wherein Mg segregation is present in the nonmagnetic layer and the Mg segregation accounts for 0.5 to 16 percent of the total area as observed on an electron micrograph of a section of the nonmagnetic layer, while the size of Mg segregation is preferably 0.2 to 10 ?m.
    Type: Grant
    Filed: January 23, 2014
    Date of Patent: July 28, 2015
    Assignee: TAIYO YUDEN CO., LTD.
    Inventors: Keiko Shiroki, Takashi Nakajima, Kenji Otake
  • Publication number: 20140266545
    Abstract: A common mode choke coil exhibiting greater reliability against moisture load includes a nonmagnetic layer made of glass, magnetic layers placed in a manner sandwiching the nonmagnetic layer, and two or more coil conductors embedded in a base material constituted by the nonmagnetic layer and magnetic layers, wherein Mg segregation is present in the nonmagnetic layer and the Mg segregation accounts for 0.5 to 16 percent of the total area as observed on an electron micrograph of a section of the nonmagnetic layer, while the size of Mg segregation is preferably 0.2 to 10 ?m.
    Type: Application
    Filed: January 23, 2014
    Publication date: September 18, 2014
    Applicant: TAIYO YUDEN CO., LTD.
    Inventors: Keiko SHIROKI, Takashi NAKAJIMA, Kenji OTAKE
  • Patent number: 8758940
    Abstract: A lithium-titanium complex oxide containing Li4Ti5O12 is characterized in that, based on SEM observation, the number-based percentage of particles whose size is less than 0.1 ?m is 5 to 15% or 40 to 65%, the number-based percentage of particles whose size is 0.3 to 1.5 ?m is 15 to 30%, the specific surface area measured by the BET method is 5.8 to 10.1 m2/g, and the average particle size D50 according to the particle size distribution measured by laser diffraction measurement is preferably 0.6 to 1.5 ?m.
    Type: Grant
    Filed: November 28, 2012
    Date of Patent: June 24, 2014
    Assignee: Taiyo Yuden Co., Ltd.
    Inventors: Keiko Shiroki, Chie Kawamura, Daigo Ito, Akitoshi Wagawa, Masaki Mochigi, Toshimasa Suzuki
  • Publication number: 20130260251
    Abstract: A lithium-titanium complex oxide containing Li4Ti5O12 is characterized in that, based on SEM observation, the number-based percentage of particles whose size is less than 0.1 ?m is 5 to 15% or 40 to 65%, the number-based percentage of particles whose size is 0.3 to 1.5 ?m is 15 to 30%, the specific surface area measured by the BET method is 5.8 to 10.1 m2/g, and the average particle size D50 according to the particle size distribution measured by laser diffraction measurement is preferably 0.6 to 1.5 ?m.
    Type: Application
    Filed: November 28, 2012
    Publication date: October 3, 2013
    Applicant: TAIYO YUDEN CO., LTD.
    Inventors: Keiko SHIROKI, Chie KAWAMURA, Daigo ITO, Akitoshi WAGAWA, Masaki MOCHIGI, Toshimasa SUZUKI