Patents by Inventor Shusaku Umemoto

Shusaku Umemoto 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: 20210096441
    Abstract: An optical modulator is provided with an optical waveguide, an electrode provided opposite to the optical waveguide, and a buffer layer provided between the optical waveguide and the electrode. A main material of the buffer layer is lanthanum fluoride.
    Type: Application
    Filed: August 28, 2020
    Publication date: April 1, 2021
    Inventor: Shusaku UMEMOTO
  • Patent number: 10781132
    Abstract: Provided is a glass ceramics sintered body including a glass phase and a ceramics phase dispersed in the glass phase, in which the ceramics phase includes alumina grains and zirconia grains, the glass phase includes an MO—Al2O3—SiO2—B2O3 based glass, in which “M” is an alkaline earth metal, and an area ratio of the alumina grains is 0.05 to 12% and the area ratio of the zirconia grains is 0.05 to 6% on the cross section of the sintered body. According to the invention, a glass ceramics sintered body, capable of a low temperature sintering having a low dielectric constant and a sufficient strength, and a coil electronic component using thereof can be provided.
    Type: Grant
    Filed: February 2, 2018
    Date of Patent: September 22, 2020
    Assignee: TDK CORPORATION
    Inventors: Shusaku Umemoto, Takashi Suzuki, Hidekazu Sato, Masaki Takahashi, Shinichi Kondo
  • Patent number: 10600540
    Abstract: A laminated coil component includes an element assembly formed by laminating a plurality of insulation layers and a coil unit formed inside the element assembly by a plurality of coil conductors. The element assembly includes a coil unit arrangement layer which has the coil unit arranged therein, and at least a pair of shape retention layers which is provided to have the coil unit arrangement layer interposed therebetween to retain a shape of the coil unit arrangement layer. The shape retention layer is made from glass-ceramic containing SrO, and a softening point of the coil unit arrangement layer is lower than a softening point or a melting point of the shape retention layer.
    Type: Grant
    Filed: July 3, 2018
    Date of Patent: March 24, 2020
    Assignee: TDK CORPORATION
    Inventors: Takahiro Sato, Yuya Ishima, Shusaku Umemoto, Takashi Suzuki, Satoru Okamoto, Yoshikazu Sakaguchi
  • Publication number: 20190194063
    Abstract: A glass ceramics sintered body includes a glass phase and a ceramics phase dispersed in the glass phase. The ceramics phase includes alumina grains and zirconia grains. The glass phase includes an MO—Al2O3—SiO2—B2O3 based glass, where M is an alkaline earth metal. An area ratio of the alumina grains is 13 to 30%, and an area ratio of the zirconia grains is 0.05 to 6%, on a cross section of the sintered body.
    Type: Application
    Filed: November 6, 2018
    Publication date: June 27, 2019
    Applicant: TDK CORPORATION
    Inventors: Shusaku UMEMOTO, Takashi SUZUKI, Hidekazu SATO, Masaki TAKAHASHI, Shinichi KONDO
  • Publication number: 20180330855
    Abstract: A laminated coil component includes an element assembly formed by laminating a plurality of insulation layers and a coil unit formed inside the element assembly by a plurality of coil conductors. The element assembly includes a coil unit arrangement layer which has the coil unit arranged therein, and at least a pair of shape retention layers which is provided to have the coil unit arrangement layer interposed therebetween to retain a shape of the coil unit arrangement layer. The shape retention layer is made from glass-ceramic containing SrO, and a softening point of the coil unit arrangement layer is lower than a softening point or a melting point of the shape retention layer.
    Type: Application
    Filed: July 3, 2018
    Publication date: November 15, 2018
    Applicant: TDK CORPORATION
    Inventors: Takahiro SATO, Yuya ISHIMA, Shusaku UMEMOTO, Takashi SUZUKI, Satoru OKAMOTO, Yoshikazu SAKAGUCHI
  • Publication number: 20180230040
    Abstract: Provided is a glass ceramics sintered body including a glass phase and a ceramics phase dispersed in the glass phase, in which the ceramics phase includes alumina grains and zirconia grains, the glass phase includes an MO-Al2O3—SiO2—B2O3 based glass, in which “M” is an alkaline earth metal, and an area ratio of the alumina grains is 0.05 to 12% and the area ratio of the zirconia grains is 0.05 to 6% on the cross section of the sintered body. According to the invention, a glass ceramics sintered body, capable of a low temperature sintering having a low dielectric constant and a sufficient strength, and a coil electronic component using thereof can be provided.
    Type: Application
    Filed: February 2, 2018
    Publication date: August 16, 2018
    Applicant: TDK CORPORATION
    Inventors: Shusaku UMEMOTO, Takashi SUZUKI, Hidekazu SATO, Masaki TAKAHASHI, Shinichi KONDO
  • Patent number: 10043608
    Abstract: A laminated coil component includes an element assembly formed by laminating a plurality of insulation layers and a coil unit formed inside the element assembly by a plurality of coil conductors. The element assembly includes a coil unit arrangement layer which has the coil unit arranged therein, and at least a pair of shape retention layers which is provided to have the coil unit arrangement layer interposed therebetween to retain a shape of the coil unit arrangement layer. The shape retention layer is made from glass-ceramic containing SrO, and a softening point of the coil unit arrangement layer is lower than a softening point or a melting point of the shape retention layer.
    Type: Grant
    Filed: August 20, 2012
    Date of Patent: August 7, 2018
    Assignee: TDK CORPORATION
    Inventors: Takahiro Sato, Yuya Ishima, Shusaku Umemoto, Takashi Suzuki, Satoru Okamoto, Yoshikazu Sakaguchi
  • Patent number: 9573837
    Abstract: A glass ceramic composition of the present invention includes a main component composed of a first glass, a second glass, Al2O3, and SiO2. The first glass is SiO2—K2O—B2O3 based glass. The second glass is MO—SiO2—Al2O3—B2O3 based glass (“M” is an alkaline-earth metal) and/or CaO—SiO2—Al2O3—ZnO—ZrO2—B2O3 based glass. In case that the total amount of the main component is 100 wt %, the main component contains the second glass of 12 to 30 wt %, the first and second glass of 40 to 56 wt % in total, and further Al2O3 of 7 to 18 wt %.
    Type: Grant
    Filed: February 4, 2016
    Date of Patent: February 21, 2017
    Assignee: TDK CORPORATION
    Inventors: Shusaku Umemoto, Takashi Suzuki, Masaki Takahashi, Hidekazu Sato, Yukari Akita, Kazuya Tobita, Shinichi Kondo
  • Publication number: 20160229738
    Abstract: A glass ceramic composition of the present invention includes a main component composed of a first glass, a second glass, Al2O3, and SiO2. The first glass is SiO2—K2O—B2O3 based glass. The second glass is MO—SiO2—Al2O3—B2O3 based glass (“M” is an alkaline-earth metal) and/or CaO—SiO2—Al2O3—ZnO—ZrO2—B2O3 based glass. In case that the total amount of the main component is 100 wt %, the main component contains the second glass of 12 to 30 wt %, the first and second glass of 40 to 56 wt % in total, and further Al2O3 of 7 to 18 wt %.
    Type: Application
    Filed: February 4, 2016
    Publication date: August 11, 2016
    Applicant: TDK CORPORATION
    Inventors: Shusaku UMEMOTO, Takashi SUZUKI, Masaki TAKAHASHI, Hidekazu SATO, Yukari AKITA, Kazuya TOBITA, Shinichi KONDO
  • Patent number: 9159467
    Abstract: In order to provide a dielectric ceramic composition capable of sintering at a low temperature, implementing a low relative dielectric constant, providing other excellent properties (such as a relative density and an insulation resistance), performing co-firing of different materials, and suppressing dispersion of Ag in the sintered body when the internal electrode is formed, the dielectric ceramic composition includes a main ingredient containing SiO2—K2O—B2O3-based glass of 40 to 65 weight %, quartz of 35 to 50 weight %, and amorphous silica of remaining weight %; and a subsidiary ingredient containing alumina of 1.5 to 4 weight %, K2O-MO—SiO2—B2O3-based glass (where “MO” denotes at least any one selected from a group consisting of CaO and SrO) of 5 to 20 weight % relative to the main ingredient of 100 weight %.
    Type: Grant
    Filed: January 28, 2014
    Date of Patent: October 13, 2015
    Assignee: TDK CORPORATION
    Inventors: Shusaku Umemoto, Takashi Suzuki, Hidekazu Sato, Masaki Takahashi, Shinichi Kondo
  • Patent number: 8952778
    Abstract: In the laminated coil component, the grain diameter of the coil conductors is 10 ?m to 22 ?m after baking is completed. When the grain diameter of the coil conductors is set to be 10 ?m or larger after baking is completed, surface roughness of the coil conductors can be reduced to such an extent that a satisfactory Q value can be obtained at a high frequency. In addition, when the grain diameter of the coil conductors is set to be 22 ?m or smaller after baking is completed, metal of the coil conductors can be refrained from being rapidly melted down during baking. Accordingly, a high Q value can be obtained while a high quality is ensured.
    Type: Grant
    Filed: August 20, 2012
    Date of Patent: February 10, 2015
    Assignee: TDK Corporation
    Inventors: Takahiro Sato, Yuya Ishima, Shusaku Umemoto, Takashi Suzuki, Satoru Okamoto, Yoshikazu Sakaguchi
  • Publication number: 20140220364
    Abstract: In order to provide a dielectric ceramic composition capable of sintering at a low temperature, implementing a low relative dielectric constant, providing other excellent properties (such as a relative density and an insulation resistance), performing co-firing of different materials, and suppressing dispersion of Ag in the sintered body when the internal electrode is formed, the dielectric ceramic composition includes a main ingredient containing SiO2—K2O—B2O3-based glass of 40 to 65 weight %, quartz of 35 to 50 weight %, and amorphous silica of remaining weight %; and a subsidiary ingredient containing alumina of 1.5 to 4 weight %, K2O-MO—SiO2—B2O3-based glass (where “MO” denotes at least any one selected from a group consisting of CaO and SrO) of 5 to 20 weight % relative to the main ingredient of 100 weight %.
    Type: Application
    Filed: January 28, 2014
    Publication date: August 7, 2014
    Applicant: TDK Corporation
    Inventors: Shusaku UMEMOTO, Takashi Suzuki, Hidekazu Sato, Masaki Takahashi, Shinichi Kondo
  • Publication number: 20140145816
    Abstract: A laminated coil component includes an element assembly formed by laminating a plurality of insulation layers and a coil unit formed inside the element assembly by a plurality of coil conductors. The element assembly includes a coil unit arrangement layer which has the coil unit arranged therein, and at least a pair of shape retention layers which is provided to have the coil unit arrangement layer interposed therebetween to retain a shape of the coil unit arrangement layer. The shape retention layer is made from glass-ceramic containing SrO, and a softening point of the coil unit arrangement layer is lower than a softening point or a melting point of the shape retention layer.
    Type: Application
    Filed: August 20, 2012
    Publication date: May 29, 2014
    Applicant: TDK CORPORATION
    Inventors: Takahiro Sato, Yuya Ishima, Shusaku Umemoto, Takashi Suzuki, Satoru Okamoto, Yoshikazu Sakaguchi
  • Publication number: 20140118100
    Abstract: In the laminated coil component, the grain diameter of the coil conductors is 10 ?m to 22 ?m after baking is completed. When the grain diameter of the coil conductors is set to be 10 ?m or larger after baking is completed, surface roughness of the coil conductors can be reduced to such an extent that a satisfactory Q value can be obtained at a high frequency. In addition, when the grain diameter of the coil conductors is set to be 22 ?m or smaller after baking is completed, metal of the coil conductors can be refrained from being rapidly melted down during baking. Accordingly, a high Q value can be obtained while a high quality is ensured.
    Type: Application
    Filed: August 20, 2012
    Publication date: May 1, 2014
    Applicant: TDK CORPORATION
    Inventors: Takahiro Sato, Yuya ISHIMA, Shusaku Umemoto, Takashi Suzuki, Satoru Okamoto, Yoshikazu Sakaguchi
  • Patent number: 8102223
    Abstract: A dielectric ceramic composition comprises as a main component, Cu oxide, Si oxide and one selected from the group consisting of Zn oxide alone and a combination of Mg oxide and Zn oxide, as a subcomponent, a glass component including B oxide and at least one selected from the group consisting of Si oxide, Ba oxide, Ca oxide, Sr oxide, Li oxide and Zn oxide, and having a glass softening point is 750° C. or less, wherein a content of said glass component is 1.5 to 15 wt % with respect to 100 wt % of said main component. According to the present invention, a dielectric ceramic composition can be provided which is available to be sintered at low temperature (for example, 950° C. or lower) while comparatively decreasing contents of a glass component, which shows good properties (specific permittivity, loss Q value and insulation resistance), and which is available to perform cofiring different materials.
    Type: Grant
    Filed: May 11, 2009
    Date of Patent: January 24, 2012
    Assignee: TDK Corporation
    Inventors: Shusaku Umemoto, Takashi Suzuki, Kouichi Kakuda, Hiroshi Momoi, Masaki Takahashi, Shinichi Kondo
  • Publication number: 20090278627
    Abstract: A dielectric ceramic composition comprises as a main component, Cu oxide, Si oxide and one selected from the group consisting of Zn oxide alone and a combination of Mg oxide and Zn oxide, as a subcomponent, a glass component including B oxide and at least one selected from the group consisting of Si oxide, Ba oxide, Ca oxide, Sr oxide, Li oxide and Zn oxide, and having a glass softening point is 750° C. or less, wherein a content of said glass component is 1.5 to 15 wt % with respect to 100 wt % of said main component. According to the present invention, a dielectric ceramic composition can be provided which is available to be sintered at low temperature (for example, 950° C. or lower) while comparatively decreasing contents of a glass component, which shows good properties (specific permittivity, loss Q value and insulation resistance), and which is available to perform cofiring different materials.
    Type: Application
    Filed: May 11, 2009
    Publication date: November 12, 2009
    Applicant: TDK CORPORATION
    Inventors: Shusaku Umemoto, Takashi Suzuki, Kouichi Kakuda, Hiroshi Momoi, Masaki Takahashi, Shinichi Kondo