Patents by Inventor Masaya Yukinobu

Masaya Yukinobu 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: 6673142
    Abstract: A transparent conductive layered structure which has the functions of preventing electrostatic charging or shielding an electric field, and preventing reflection, the two-layered film of which has an excellent scratch strength, and with which a reduction in production cost is expected and a method of producing the same, and a transparent coat layer forming coating liquid used in the method of producing the same, and a display device to which the transparent conductive layered structure is applied, are provided.
    Type: Grant
    Filed: July 24, 2001
    Date of Patent: January 6, 2004
    Assignee: Sumitomo Metal Mining Co., Ltd.
    Inventors: Atsushi Tofuku, Masaya Yukinobu
  • Publication number: 20030180511
    Abstract: A process for producing a noble-metal type fine-particle dispersions, having the steps of an agglomeration step of adding a hydrazine solution to a dispersion in which primary particles of noble-metal type fine particles have been made to stand monodisperse in a solvent, to destabilize the dispersibility of the noble-metal type fine particles in the dispersion and cause the plurality of primary particles in the noble-metal type fine particles to agglomerate in the form of chains to obtain a dispersion of chainlike agglomerates; and a stabilization step of adding a hydrogen peroxide solution to the dispersion of the chainlike agglomerates obtained, to decompose and remove the hydrazine to stabilize the dispersibility of the chainlike agglomerates in the dispersion.
    Type: Application
    Filed: March 19, 2003
    Publication date: September 25, 2003
    Applicant: Sumitomo Metal Mining Co., Ltd.
    Inventors: Masaya Yukinobu, Yukiko Suekane
  • Publication number: 20030170448
    Abstract: The present invention relates to a transparent conductive layered structure which comprises a transparent substrate, a transparent conductive layer and a transparent coating layer formed successively in this order on the substrate, and is used in, for instance, the front panel of displays such as CRT, etc. The transparent conductive layered structure according to the invention is characterized in that the main components of the above-mentioned transparent conductive layer are gold microparticles or gold-containing noble metal microparticles containing 5 wt % or more of gold with a mean particle diameter of 1 to 100 nm, and a binder matrix comprising at least one functional group selected from mercapto groups (—SH), sulfide groups (—S), and polysulfide groups (—Sx, X≧2). Film strength and weather resistance of the transparent conductive layer are improved because the noble metal microparticles and a binder matrix are firmly bonded via the above-mentioned functional groups.
    Type: Application
    Filed: December 30, 2002
    Publication date: September 11, 2003
    Applicant: SUMITOMO METAL MINING CO., LTD.
    Inventors: Masaya Yukinobu, Atsushi Tofuku, Kenji Kato, Midori Fujisaki
  • Publication number: 20030165616
    Abstract: The present invention relates to a transparent conductive layered structure which comprises a transparent substrate, a transparent conductive layer and a transparent coating layer formed successively in this order on the substrate, and is used in, for instance, the front panel of displays such as CRT, etc. The transparent conductive layered structure according to the invention is characterized in that the main components of the above-mentioned transparent conductive layer are gold microparticles or gold-containing noble metal microparticles containing 5 wt % or more of gold with a mean particle diameter of 1 to 100 nm, and a binder matrix comprising at least one functional group selected from mercapto groups (—SH), sulfide groups (—S), and polysulfide groups (—Sx, X≧2). Film strength and weather resistance of the transparent conductive layer are improved because the noble metal microparticles and a binder matrix are firmly bonded via the above-mentioned functional groups.
    Type: Application
    Filed: December 27, 2002
    Publication date: September 4, 2003
    Applicant: SUMITOMO METAL MINING CO., LTD.
    Inventors: Masaya Yukinobu, Atsushi Tofuku, Kenji Kato, Midori Fujisaki
  • Patent number: 6569359
    Abstract: The object is to provide a transparent conductive layer forming coating liquid capable of forming a transparent conductive layer having such characteristics as high transmittance, low resistance, low reflectance and high strength and with few film defects. The transparent conductive layer forming coating liquid of the present invention is characterized in that it comprises, as its main components, a solvent and noble metal microparticles with a mean particle diameter of 1 to 100 nm dispersed in the solvent, and that the above-mentioned solvent comprises 0.005 to 1.0 wt % of formamide (HCONH2). Further, using this transparent conductive layer forming coating liquid, it is possible to form a conductive layer with developed meshy structures easily so that it can form transparent conductive layers having such characteristics as high transmittance, low resistance, low reflectance and high strength and with few film defects.
    Type: Grant
    Filed: July 24, 2001
    Date of Patent: May 27, 2003
    Assignee: Sumitomo Metal Mining Co., Ltd.
    Inventors: Masaya Yukinobu, Kennichi Fujita, Atsushi Tofuku, Kenji Kato
  • Patent number: 6558581
    Abstract: A transparent electro-conductive structure comprising a transparent substrate and formed successively thereon a transparent electro-conductive layer and a transparent coat layer, which is used in, e.g., front panels of display devices such as CRTs. The transparent electro-conductive layer is composed chiefly of i) noble-metal-coated fine silver particles having an average particle diameter of from 1 nm to 100 nm, the fine silver particles being surface-coated with gold or platinum alone or a composite of gold and platinum, and ii) a binder matrix. A transparent electro-conductive layer forming coating fluid used in the production of this transparent conductive structure comprises a solvent and noble-metal-coated fine silver particles dispersed in the solvent and having an average particle diameter of from 1 nm to 100 nm, the fine silver particles being surface-coated with gold or platinum alone or a composite of gold and platinum.
    Type: Grant
    Filed: May 31, 2001
    Date of Patent: May 6, 2003
    Assignee: Sumitomo Metal Mining Co., Ltd.
    Inventors: Masaya Yukinobu, Kenji Kato
  • Patent number: 6528112
    Abstract: The present invention relates to a transparent conductive layered structure having a transparent substrate and a transparent conductive layer and transparent coating layer formed in succession on this substrate, used in, for instance, the front panel of CRT, etc., display devices. The main components of said transparent conductive layer are noble metal microparticles with a mean particle diameter of 1 to 100 nm, wherein the microparticles are made from gold and/or platinum and silver and the gold and/or platinum content is within a range exceeding 50 wt % up to 95 wt %, and a binder matrix.
    Type: Grant
    Filed: April 30, 2002
    Date of Patent: March 4, 2003
    Assignee: Sumitomo Metal Mining Co., Ltd.
    Inventors: Kenji Kato, Masaya Yukinobu
  • Patent number: 6511614
    Abstract: Disclosed are a powder of indium-tin oxide aciculae suitable as an electroconductive filler for an electroconductive ink to be used for forming a transparent electroconductive film, a method for producing a raw material to be used for producing the powder of indium-tin oxide aciculae, which has a major diameter of 5 &mgr;m or more and a ratio of the major diameter to the minor diameter of 5 or more, an electroconductive paste capable of forming a light-transmitting electroconductive film having sufficient electroconductivity and light transmittance by printing, such as screen-printing, followed by high-temperature baking, and a light-transmitting electroconductive film to be formed from the paste. The raw material is produced by heating and concentrating an aqueous solution containing indium ions and nitrato ions to form a high-viscosity slurry followed by separating a powder of aciculae from the slurry. By calcining the raw material, a powder of indium-tin oxide aciculae is produced.
    Type: Grant
    Filed: February 19, 1999
    Date of Patent: January 28, 2003
    Assignee: Sumitomo Metal Mining Co., Ltd.
    Inventors: Masaya Yukinobu, Morikazu Kojima, Mitsuo Usuba
  • Publication number: 20020192458
    Abstract: The present invention relates to a transparent conductive layered structure having a transparent substrate and a transparent conductive layer and transparent coating layer formed in succession on this substrate, used in, for instance, the front panel of CRT, etc., display devices. The main components of said transparent conductive layer are noble metal microparticles with a mean particle diameter of 1 to 100 nm, wherein the microparticles are made from gold and/or platinum and silver and the gold and/or platinum content is within a range exceeding 50 wt % up to 95 wt %, and a binder matrix.
    Type: Application
    Filed: April 30, 2002
    Publication date: December 19, 2002
    Applicant: SUMITOMO METAL MINING CO., LTD.
    Inventors: Kenji Kato, Masaya Yukinobu
  • Patent number: 6489029
    Abstract: The present invention relates to a transparent conductive layered structure having a transparent substrate and a transparent conductive layer and transparent coating layer formed in succession on this substrate, used in, for instance, the front panel of CRT, etc., display devices. The main components of said transparent conductive layer are noble metal microparticles with a mean particle diameter of 1 to 100 nm, wherein the microparticles are made from gold and/or platinum and silver and the gold and/or platinum content is within a range exceeding 50 wt % up to 95 wt %, and a binder matrix.
    Type: Grant
    Filed: April 30, 2002
    Date of Patent: December 3, 2002
    Assignee: Sumitomo Metal Mining Co., Ltd.
    Inventors: Kenji Kato, Masaya Yukinobu
  • Patent number: 6482466
    Abstract: A transparent electro-conductive structure comprising a transparent substrate and formed successively thereon a transparent electro-conductive layer and a transparent coat layer, which is used in, e.g., front panels of display devices such as CRTS. The transparent electro-conductive layer is composed chiefly of I) noble-metal-coated fine silver particles having an average particle diameter of from 1 nm to 100 nm, the fine silver particles being surface-coated with gold or platinum alone or a composite of gold and platinum, and ii) a binder matrix. A transport electro-conductive layer forming coating fluid used in the production of this transparent conductive structure comprises a solvent and noble-metal-coated fine silver particles dispersed in the solvent and having an average particle diameter of from 1 nm to 100 nm, the fine silver particles being surface-coated with gold or platinum alone or a composite of gold and platinum.
    Type: Grant
    Filed: May 31, 2001
    Date of Patent: November 19, 2002
    Assignee: Sumitomo Metal Mining Co., Ltd.
    Inventors: Masaya Yukinobu, Kenji Kato
  • Publication number: 20020168478
    Abstract: The present invention relates to a transparent conductive layered structure having a transparent substrate and a transparent conductive layer and transparent coating layer formed in succession on this substrate, used in, for instance, the front panel of CRT, etc., display devices. The main components of said transparent conductive layer are noble metal microparticles with a mean particle diameter of 1 to 100 nm, wherein the microparticles are made from gold and/or platinum and silver and the gold and/or platinum content is within a range exceeding 50 wt % up to 95 wt %, and a binder matrix.
    Type: Application
    Filed: April 30, 2002
    Publication date: November 14, 2002
    Applicant: SUMITOMO METAL MINING CO., LTD.
    Inventors: Kenji Kato, Masaya Yukinobu
  • Patent number: 6447909
    Abstract: The present invention relates to a transparent conductive layered structure having a transparent substrate and a transparent conductive layer and transparent coating layer formed in succession on this substrate, used in, for instance, the front panel of CRT, etc., display devices. The main components of said transparent conductive layer are noble metal microparticles with a mean particle diameter of 1 to 100 nm, wherein the microparticles are made from gold and/or platinum and silver and the gold and/or platinum content is within a range exceeding 50 wt % up to 95 wt %, and a binder matrix.
    Type: Grant
    Filed: January 4, 2000
    Date of Patent: September 10, 2002
    Assignee: Sumitomo Metal Mining Co., Ltd.
    Inventors: Kenji Kato, Masaya Yukinobu
  • Patent number: 6423404
    Abstract: A low-transmission transparent layered structure made of a transparent substrate and a low-transmission transparent layer formed on the transparent substrate, wherein the low-transmission transparent layer is constituted of black pigment fine particles having a mean particle size of from 10 to 150 nm and a binder matrix as the main constituents, the black pigment fine particles are composite oxide fine particles of iron, manganese, and copper, or are carbon fine particles and black titanium compound fine particles, the visible light transmittance of the low-transmission transparent layer is from 40 to 90%, and the standard deviation of the transmittance of the low-transmission transparent layer in each wavelength every 5 nm of a visible light wavelength region (380 to 780 nm) is 5% or lower. The low-transmission transparent layer structure has a flat transmission profile, can impart a low reflectance and antistatic and electric field shielding functions, and is used for a display device.
    Type: Grant
    Filed: January 18, 2000
    Date of Patent: July 23, 2002
    Assignee: Sumitomo Metal Mining Co., Ltd.
    Inventors: Yoshihiro Ohtsuka, Masaya Yukinobu
  • Patent number: 6398985
    Abstract: A transparent electro-conductive structure comprising a transparent substrate and formed successively thereon a transparent electro-conductive layer and a transparent coat layer, which is used in, e.g., front panels of display devices such as CRTs. The transparent electro-conductive layer is composed chiefly of i) noble-metal-coated fine silver particles having an average particle diameter of from 1 nm to 100 nm, the fine silver particles being surface-coated with gold or platinum alone or a composite of gold and platinum, and ii) a binder matrix. A transparent electro-conductive layer forming coating fluid used in the production of this transparent conductive structure comprises a solvent and noble-metal-coated fine silver particles dispersed in the solvent and having an average particle diameter of from 1 nm to 100 nm, the fine silver particles being surface-coated with gold or platinum alone or a composite of gold and platinum.
    Type: Grant
    Filed: May 31, 2001
    Date of Patent: June 4, 2002
    Assignee: Sumitomo Metal Mining Co., Ltd.
    Inventors: Masaya Yukinobu, Kenji Kato
  • Publication number: 20020047108
    Abstract: The object is to provide a transparent conductive layer forming coating liquid capable of forming a transparent conductive layer having such characteristics as high transmittance, low resistance, low reflectance and high strength and with few film defects. The transparent conductive layer forming coating liquid of the present invention is characterized in that it comprises, as its main components, a solvent and noble metal microparticles with a mean particle diameter of 1 to 100 nm dispersed in the solvent, and that the above-mentioned solvent comprises 0.005 to 1.0 wt % of formamide (HCONH2). Further, using this transparent conductive layer forming coating liquid, it is possible to form a conductive layer with developed meshy structures easily so that it can form transparent conductive layers having such characteristics as high transmittance, low resistance, low reflectance and high strength and with few film defects.
    Type: Application
    Filed: July 24, 2001
    Publication date: April 25, 2002
    Applicant: Sumitomo Metal Mining Co., Ltd.
    Inventors: Masaya Yukinobu, Kennichi Fujita, Atsushi Tofuku, Kenji Kato
  • Publication number: 20020037398
    Abstract: A transparent conductive layered structure which has the functions of preventing electrostatic charging or shielding an electric field, and preventing reflection, the two-layered film of which has an excellent scratch strength, and with which a reduction in production cost is expected and a method of producing the same, and a transparent coat layer forming coating liquid used in the method of producing the same. and a display device to which the transparent conductive layered structure is applied, are provided.
    Type: Application
    Filed: July 24, 2001
    Publication date: March 28, 2002
    Applicant: Sumitomo Metal Mining Co., Ltd.
    Inventors: Atsushi Tofuku, Masaya Yukinobu
  • Publication number: 20010032968
    Abstract: A transparent electro-conductive structure comprising a transparent substrate and formed successively thereon a transparent electro-conductive layer and a transparent coat layer, which is used in, e.g., front panels of display devices such as CRTs. The transparent electro-conductive layer is composed chiefly of i) noble-metal-coated fine silver particles having an average particle diameter of from 1 nm to 100 nm, the fine silver particles being surface-coated with gold or platinum alone or a composite of gold and platinum, and ii) a binder matrix.
    Type: Application
    Filed: May 31, 2001
    Publication date: October 25, 2001
    Applicant: Sumitomo Metal Mining Co., Ltd.
    Inventors: Masaya Yukinobu, Kenji Kato
  • Publication number: 20010032969
    Abstract: A transparent electro-conductive structure comprising a transparent substrate and formed successively thereon a transparent electro-conductive layer and a transparent coat layer, which is used in, e.g., front panels of display devices such as CRTs. The transparent electro-conductive layer is composed chiefly of i) noble-metal-coated fine silver particles having an average particle diameter of from 1 nm to 100 nm, the fine silver particles being surface-coated with gold or platinum alone or a composite of gold and platinum, and ii) a binder matrix.
    Type: Application
    Filed: May 31, 2001
    Publication date: October 25, 2001
    Applicant: Sumitomo Metal Mining Co., Ltd
    Inventors: Masaya Yukinobu, Kenji Kato
  • Publication number: 20010032970
    Abstract: A transparent electro-conductive structure comprising a transparent substrate and formed successively thereon a transparent electro-conductive layer and a transparent coat layer, which is used in, e.g., front panels of display devices such as CRTs. The transparent electro-conductive layer is composed chiefly of i) noble-metal-coated fine silver particles having an average particle diameter of from 1 nm to 100 nm, the fine silver particles being surface-coated with gold or platinum alone or a composite of gold and platinum, and ii) a binder matrix.
    Type: Application
    Filed: May 31, 2001
    Publication date: October 25, 2001
    Applicant: Sumitomo Metal Mining Co., Ltd.
    Inventors: Masaya Yukinobu, Kenji Kato