Patents by Inventor Atsushi Tofuku

Atsushi Tofuku 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: 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
  • 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