Patents by Inventor Fusao Hojo

Fusao Hojo 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: 11840619
    Abstract: Provided are an epoxy resin composition including hexagonal boron nitride particles having an aspect ratio of 2 or more, a liquid crystalline epoxy monomer, and a curing agent, and the epoxy resin composition being capable of forming a resin matrix having a smectic domain by reacting the liquid crystalline epoxy monomer with the curing agent, and a thermally-conductive material precursor, a B-stage sheet, a prepreg, a heat dissipation material, a laminate, a metal substrate, and a printed circuit board, which use the epoxy resin composition.
    Type: Grant
    Filed: January 8, 2020
    Date of Patent: December 12, 2023
    Assignee: RESONAC CORPORATION
    Inventors: Yoshitaka Takezawa, Shingo Tanaka, Fusao Hojo
  • Publication number: 20200140651
    Abstract: Provided are an epoxy resin composition including hexagonal boron nitride particles having an aspect ratio of 2 or more, a liquid crystalline epoxy monomer, and a curing agent, and the epoxy resin composition being capable of forming a resin matrix having a smectic domain by reacting the liquid crystalline epoxy monomer with the curing agent, and a thermally-conductive material precursor, a B-stage sheet, a prepreg, a heat dissipation material, a laminate, a metal substrate, and a printed circuit board, which use the epoxy resin composition.
    Type: Application
    Filed: January 8, 2020
    Publication date: May 7, 2020
    Inventors: Yoshitaka TAKEZAWA, Shingo TANAKA, Fusao HOJO
  • Patent number: 10597485
    Abstract: A production method for a glassy liquid-crystalline epoxy resin, comprising a process of cooling a liquid-crystalline epoxy resin to cause transition into a glassy state.
    Type: Grant
    Filed: October 17, 2017
    Date of Patent: March 24, 2020
    Assignee: HITACHI CHEMICAL COMPANY, LTD.
    Inventors: Shingo Tanaka, Tomoko Higashiuchi, Naoki Maruyama, Kazumasa Fukuda, Yoshitaka Takezawa, Fusao Hojo
  • Patent number: 10584228
    Abstract: Provided are an epoxy resin composition including hexagonal boron nitride particles having an aspect ratio of 2 or more, a liquid crystalline epoxy monomer, and a curing agent, and the epoxy resin composition being capable of forming a resin matrix having a smectic domain by reacting the liquid crystalline epoxy monomer with the curing agent, and a thermally-conductive material precursor, a B-stage sheet, a prepreg, a heat dissipation material, a laminate, a metal substrate, and a printed circuit board, which use the epoxy resin composition.
    Type: Grant
    Filed: May 20, 2016
    Date of Patent: March 10, 2020
    Assignee: HITACHI CHEMICAL COMPANY, LTD.
    Inventors: Yoshitaka Takezawa, Shingo Tanaka, Fusao Hojo
  • Publication number: 20190375885
    Abstract: A production method for a glassy liquid-crystalline epoxy resin, comprising a process of cooling a liquid-crystalline epoxy resin to cause transition into a glassy state.
    Type: Application
    Filed: October 17, 2017
    Publication date: December 12, 2019
    Applicant: Hitachi Chemical Company, Ltd.
    Inventors: Shingo TANAKA, Tomoko HIGASHIUCHI, Naoki MARUYAMA, Kazumasa FUKUDA, Yoshitaka TAKEZAWA, Fusao HOJO
  • Patent number: 10186473
    Abstract: An object of the present invention is to provide a power module capable of realizing a superior heat radiation property while satisfying a high insulation property. A power module according to the present invention includes: a conductor plate to which a switching element is connected; a heat radiation plate which is disposed to face the conductor plate; an insulating member which is disposed between the conductor plate and the heat radiation plate; and a conductive intermediate conductor which is disposed in the insulating member in a state of being electrically insulated from the conductor plate and the heat radiation plate, wherein the intermediate conductor has a communication region which communicates between the insulating member disposed on the side of the conductor plate with respect to the intermediate conductor and the insulating member disposed on the side of the heat radiation plate with respect to the intermediate conductor.
    Type: Grant
    Filed: July 11, 2016
    Date of Patent: January 22, 2019
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Fusao Hojo, Nobutake Tsuyuno, Toshiaki Ishii, Junpei Kusukawa, Akira Matsushita
  • Publication number: 20180218963
    Abstract: An object of the present invention is to provide a power module capable of realizing a superior heat radiation property while satisfying a high insulation property. A power module according to the present invention includes: a conductor plate to which a switching element is connected; a heat radiation plate which is disposed to face the conductor plate; an insulating member which is disposed between the conductor plate and the heat radiation plate; and a conductive intermediate conductor which is disposed in the insulating member in a state of being electrically insulated from the conductor plate and the heat radiation plate, wherein the intermediate conductor has a communication region which communicates between the insulating member disposed on the side of the conductor plate with respect to the intermediate conductor and the insulating member disposed on the side of the heat radiation plate with respect to the intermediate conductor.
    Type: Application
    Filed: July 11, 2016
    Publication date: August 2, 2018
    Inventors: Fusao HOJO, Nobutake TSUYUNO, Toshiaki ISHII, Junpei KUSUKAWA, Akira MATSUSHITA
  • Publication number: 20180163015
    Abstract: Provided are an epoxy resin composition including hexagonal boron nitride particles having an aspect ratio of 2 or more, a liquid crystalline epoxy monomer, and a curing agent, and the epoxy resin composition being capable of forming a resin matrix having a smectic domain by reacting the liquid crystalline epoxy monomer with the curing agent, and a thermally-conductive material precursor, a B-stage sheet, a prepreg, a heat dissipation material, a laminate, a metal substrate, and a printed circuit board, which use the epoxy resin composition.
    Type: Application
    Filed: May 20, 2016
    Publication date: June 14, 2018
    Inventors: Yoshitaka TAKEZAWA, Shingo TANAKA, Fusao HOJO
  • Patent number: 9249293
    Abstract: A composite particle is constituted to include: an aluminum nitride particle; a first coating layer that contains ?-alumina and coats at least a part of a region of a surface of the aluminum nitride particle; and a second coating layer that contains organic matter and coats a region other than the first coating layer of the surface of the aluminum nitride particle.
    Type: Grant
    Filed: February 17, 2011
    Date of Patent: February 2, 2016
    Assignee: HITACHI CHEMICAL COMPANY, LTD.
    Inventors: Yoshitaka Takezawa, Fusao Hojo, Shingo Tanaka, Hiroyuki Kagawa
  • Publication number: 20120315487
    Abstract: A composite particle is constituted to include: an aluminum nitride particle; a first coating layer that contains ?-alumina and coats at least a part of a region of a surface of the aluminum nitride particle; and a second coating layer that contains organic matter and coats a region other than the first coating layer of the surface of the aluminum nitride particle.
    Type: Application
    Filed: February 17, 2011
    Publication date: December 13, 2012
    Inventors: Yoshitaka Takezawa, Fusao Hojo, Shingo Tanaka, Hiroyuki Kagawa
  • Publication number: 20120190812
    Abstract: Provided is an environmentally friendly novel plant-based polycarbonate resin. Specifically, disclosed are: a plant-based polycarbonate resin which is a polymer derived from a plant-based material having a plurality of hydroxyl groups, in which molecules of the plant-based material are linked to each other through carbonate groups to form the polymer; and a production method of the polycarbonate resin.
    Type: Application
    Filed: January 26, 2012
    Publication date: July 26, 2012
    Inventors: Yoshiaki OKABE, Hiroyuki KAGAWA, Fusao HOJO
  • Publication number: 20100222460
    Abstract: The present invention provides a cellulose/resin composite wherein cellulose is uniformly dispersed in the resin and a process for producing the same. The cellulose/resin composite includes crystalline cellulose formed by reprecipitating cellulose in a polar solvent by using an ionic liquid containing cellulose dissolved therein, wherein a sum of fractions of a cellulose I type crystal component, a cellulose II type crystal component, and a non-crystalline cellulose component in the crystalline cellulose is 1, a fraction of the cellulose I type crystal component is 0.4 or more, and a fraction of the cellulose II type crystal component is 0.1 or more.
    Type: Application
    Filed: February 18, 2010
    Publication date: September 2, 2010
    Inventor: Fusao HOJO
  • Publication number: 20080238316
    Abstract: The purpose of the present invention is to provide a plasma display panel containing black colored parts which have high resistant against degradation in blackness or peeling by high-temperature oxidation.
    Type: Application
    Filed: January 24, 2008
    Publication date: October 2, 2008
    Inventors: Mitsuo Hayashibara, Yuichi Sawai, Hiroki Yamamoto, Motoyuki Miyata, Fusao Hojo, Takashi Naito, Keiichi Kanazawa, Tatsuya Miyake, Hideto Momose
  • Publication number: 20080238292
    Abstract: A plasma display panel comprising a front substrate and a back substrate formed opposite each other and bonded to each other at the peripheries, electrodes formed on the front substrate, a dielectric layer formed on the electrodes, a protective layer formed on the dielectric layer, another electrode and another dielectric layer formed on the back substrate, barrier ribs to keep spaces between the front substrate and the back substrate, and fluorescent materials packed in the spaces formed by the barrier ribs, the front substrate, and the back substrate. The barrier ribs include glass at least containing oxide of tungsten, phosphorus, barium, and vanadium.
    Type: Application
    Filed: January 28, 2008
    Publication date: October 2, 2008
    Inventors: Hiroki Yamamoto, Takashi Naito, Yuichi Sawai, Motoyuki Miyata, Fusao Hojo, Keiichi Kanazawa, Takashi Fujimura, Mitsuo Hayashibara
  • Publication number: 20080238315
    Abstract: To prevent occurrence of abnormal discharge which would reduce the quality of images in a PDP. At least one of an address electrode, a bus electrode, a bus main electrode, and a black electrode of a display electrode formed on a substrate is formed of metal particles and high-resistance glass to dissipate charge accumulated on a dielectric through the high-resistance glass and to prevent charging in a glass component itself, thereby reducing abnormal discharge. The high-resistance glass is preferably realized by vanadium phosphate glass containing vanadium, phosphorus, antimony, and barium. The metal particles desirably contain flaky particles.
    Type: Application
    Filed: January 18, 2008
    Publication date: October 2, 2008
    Inventors: Fusao Hojo, Takashi Naito, Hiroki Yamamoto, Yuichi Sawai, Motoyuki Miyata, Mitsuo Hayashibara, Keiichi Kanazawa, Hideto Momose
  • Publication number: 20080238821
    Abstract: To prevent sucking of a sealing material in steps of sealing and exhaust of a plasma display panel. The plasma display panel includes a front substrate and a rear substrate, in which the peripheries thereof are sealed by a glass sealing material. A sealing portion formed by the glass sealing material is formed of a multi-layered structure including at least two types of glass with different softening points. The entirety or part of the sealing portion on an inner side of the panel is formed of glass with the highest softening point. Since the high-temperature softened glass serves as a barrier for preventing sucking of the low-temperature softened glass into the panel, it is possible to prevent sucking of the sealing material into the panel. This can improve image display characteristics.
    Type: Application
    Filed: January 25, 2008
    Publication date: October 2, 2008
    Inventors: Motoyuki MIYATA, Yuichi SAWAI, Hiroki YAMAMOTO, Takashi NAITO, Keiichi KANAZAWA, Mitsuo HAYASHIBARA, Fusao HOJO
  • Publication number: 20080174234
    Abstract: The purpose of the present invention is to provide a spacer having a small absolute value of the temperature coefficient of resistance, the spacer being excellent in suppressing a thermal runaway, the spacer being excellent in voltage endurance so as not to cause an abnormal discharge even if a high voltage of over 10 kV is applied, the spacer being unlikely to cause deflection of an electron beam, and a flat panel display device provided with this spacer. The spacer of the flat panel display device includes, on the surface of a glass substrate, a thin film that comprises substances exhibiting metal-like electrical conductivity dispersed in an oxide matrix exhibiting semiconductor-like electrical conductivity.
    Type: Application
    Filed: January 22, 2008
    Publication date: July 24, 2008
    Inventors: Hiroki Yamamoto, Takashi Naito, Yuichi Sawai, Osamu Shiono, Motoyuki Miyata, Hiroshi Ito, Akira Hatori, Nobuhiko Hosotani, Kyoto Honbo, Fusao Hojo
  • Publication number: 20060292062
    Abstract: A mesoporous metal oxide crystal material is provided. This material has realized a large specific surface area by controlling crystallite diameter in the formation of metal oxide crystals, and preventing collapse of the mesoporous structure associated with the crystal growth upon calcinations, to improve sensitivity and effectiveness of a gas detector element of the metal oxide material and photocatalyst. A metal oxide precursor is filled in the pores of a mesoporous template, and the resulting mesoporous silica having the metal oxide precursor filled therein is added to a hydrolytic aqueous solution to thereby promote hydrolysis of the metal oxide precursor in the interior of the pores and produce a large number of metal oxide crystals in the interior of the pores. Next, the metal oxide fine crystals are heated at 300° C. or higher for calcination with the crystallite diameter controlled in the range of 1 nm to 2 nm.
    Type: Application
    Filed: June 23, 2006
    Publication date: December 28, 2006
    Inventors: Fusao Hojo, Shinji Yamada, Jiro Ushio
  • Publication number: 20050029515
    Abstract: An organic/inorganic oxide mixture has high capacitance density so as to realize a capacitor material that can be self-contained in a substrate. The mixture film made of inorganic oxide particle has a mean particle size of less than 90 nm dispersed in organic polymer, of which relative dielectric constant is more than 10 and thickness is less than 900 nm.
    Type: Application
    Filed: August 6, 2004
    Publication date: February 10, 2005
    Applicant: Hitachi, Ltd.
    Inventors: Akira Nagai, Toshiyuki Ohno, Fusao Hojo, Shinji Yamada, Mikio Konno, Yomokazu Tanase, Daisuke Naga