Patents by Inventor Sinji Furukawa

Sinji Furukawa 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).

  • Magnetic recording disk, magnetic recording disk manufacturing method and magnetic recording disk manufacturing system
    Patent number: 7517438
    Abstract: This invention presents a magnetic recording disk where an anisotropy-allowing layer to allow magnetic anisotropy to a magnetic recording layer is provided between a substrate and the magnetic recording layer. This invention also presents a magnetic-recording-disk manufacturing method comprising a step to prepare an anisotropy-allowing layer to allow magnetic anisotropy to a magnetic recording layer, prior to a step to prepare the magnetic recording layer. This invention also presents a magnetic-recording-disk manufacturing system comprising an anisotropy-allowing-layer preparation chamber, in which an anisotropy-allowing layer to allow magnetic anisotropy to a magnetic recording layer is prepared on a substrate, prior to preparation of the magnetic recording layer. In this invention, the anisotropy-allowing layer is made of; nitride of niobium, tantalum, niobium alloy or tantalum alloy, or nitride-including niobium, tantalum, niobium alloy or tantalum alloy.
    Type: Grant
    Filed: April 25, 2005
    Date of Patent: April 14, 2009
    Assignee: Canon Anelva Corporation
    Inventors: Masahiro Shibamoto, Sinji Furukawa, Tetsuya Endoh, Miho Sakai, Naoki Watanabe
  • Magnetic recording disk, magnetic recording disk manufacturing method and magnetic recording disk manufacturing system
    Patent number: 7115191
    Abstract: This invention presents a magnetic recording disk where an anisotropy-allowing layer to allow magnetic anisotropy to a magnetic recording layer is provided between a substrate and the magnetic recording layer. This invention also presents a magnetic-recording-disk manufacturing method comprising a step to prepare an anisotropy-allowing layer to allow magnetic anisotropy to a magnetic recording layer, prior to a step to prepare the magnetic recording layer. This invention also presents a magnetic-recording-disk manufacturing system comprising an anisotropy-allowing-layer preparation chamber, in which an anisotropy-allowing layer to allow magnetic anisotropy to a magnetic recording layer is prepared on a substrate, prior to preparation of the magnetic recording layer. In this invention, the anisotropy-allowing layer is made of; nitride of niobium, tantalum, niobium alloy or tantalum alloy, or nitride-including niobium, tantalum, niobium alloy or tantalum alloy.
    Type: Grant
    Filed: March 4, 2002
    Date of Patent: October 3, 2006
    Assignee: Anelva Corporation
    Inventors: Masahiro Shibamoto, Sinji Furukawa, Tetsuya Endoh, Miho Sakai, Naoki Watanabe
  • Magnetic recording disk, magnetic recording disk manufacturing method and magnetic recording disk manufacturing system
    Publication number: 20050214589
    Abstract: This invention presents a magnetic recording disk where an anisotropy-allowing layer to allow magnetic anisotropy to a magnetic recording layer is provided between a substrate and the magnetic recording layer. This invention also presents a magnetic-recording-disk manufacturing method comprising a step to prepare an anisotropy-allowing layer to allow magnetic anisotropy to a magnetic recording layer, prior to a step to prepare the magnetic recording layer. This invention also presents a magnetic-recording-disk manufacturing system comprising an anisotropy-allowing-layer preparation chamber, in which an anisotropy-allowing layer to allow magnetic anisotropy to a magnetic recording layer is prepared on a substrate, prior to preparation of the magnetic recording layer. In this invention, the anisotropy-allowing layer is made of; nitride of niobium, tantalum, niobium alloy or tantalum alloy, or nitride-including niobium, tantalum, niobium alloy or tantalum alloy.
    Type: Application
    Filed: April 25, 2005
    Publication date: September 29, 2005
    Inventors: Masahiro Shibamoto, Sinji Furukawa, Tetsuya Endoh, Miho Sakai, Naoki Watanabe
  • Magnetic recording disk, magnetic recording disk manufacturing method and magnetic recording disk manufacturing system
    Publication number: 20020127436
    Abstract: This invention presents a magnetic recording disk where an anisotropy-allowing layer to allow magnetic anisotropy to a magnetic recording layer is provided between a substrate and the magnetic recording layer. This invention also presents a magnetic-recording-disk manufacturing method comprising a step to prepare an anisotropy-allowing layer to allow magnetic anisotropy to a magnetic recording layer, prior to a step to prepare the magnetic recording layer. This invention also presents a magnetic-recording-disk manufacturing system comprising an anisotropy-allowing-layer preparation chamber, in which an anisotropy-allowing layer to allow magnetic anisotropy to a magnetic recording layer is prepared on a substrate, prior to preparation of the magnetic recording layer. In this invention, the anisotropy-allowing layer is made of; nitride of niobium, tantalum, niobium alloy or tantalum alloy, or nitride-including niobium, tantalum, niobium alloy or tantalum alloy.
    Type: Application
    Filed: March 4, 2002
    Publication date: September 12, 2002
    Applicant: ANELVA CORPORATION
    Inventors: Masahiro Shibamoto, Sinji Furukawa, Tetsuya Endoh, Miho Sakai, Naoki Watanabe