Patents by Inventor Yumi Matsumura

Yumi Matsumura 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).

  • Process and apparatus for producing optical recording medium
    Patent number: 9196288
    Abstract: To produce an optical recording medium having a good concavo-convex shape whereby optical information recording/retrieving is stabilized. A process for producing an optical recording medium 100 provided with an interlayer 104 having a concavo-convex shape, which comprises a step of forming a recording layer 102 on a substrate 101 directly or via another layer; a step of placing a resin material layer 104a and a stamper 110 having a concavo-convex shape for transfer, in this order on the recording layer 102, and curing the resin material layer 104a in this laminated state to obtain a bonded body 112 comprising the substrate 101, the recording layer 102, the resin material layer 104a and the stamper 110, and a step of separating the stamper 110 from the resin material layer 104a so that the concavo-convex shape for transfer is transferred to the resin material layer 104a, and applying surface modification treatment to promote the curing of the resin material layer 104a, to form the interlayer 104.
    Type: Grant
    Filed: September 21, 2007
    Date of Patent: November 24, 2015
    Assignee: Mitsubishi Kagaku Media Co., Ltd.
    Inventors: Shigeyuki Furomoto, Masafumi Aga, Toshifumi Kawano, Hideharu Takeshima, Yukari Kiritou, Atsushi Komura, Kumi Mizuno, Yumi Matsumura
  • PROCESS AND APPARATUS FOR PRODUCING OPTICAL RECORDING MEDIUM
    Publication number: 20100090358
    Abstract: To produce an optical recording medium having a good concavo-convex shape whereby optical information recording/retrieving is stabilized. A process for producing an optical recording medium 100 provided with an interlayer 104 having a concavo-convex shape, which comprises a step of forming a recording layer 102 on a substrate 101 directly or via another layer; a step of placing a resin material layer 104a and a stamper 110 having a concavo-convex shape for transfer, in this order on the recording layer 102, and curing the resin material layer 104a in this laminated state to obtain a bonded body 112 comprising the substrate 101, the recording layer 102, the resin material layer 104a and the stamper 110, and a step of separating the stamper 110 from the resin material layer 104a so that the concavo-convex shape for transfer is transferred to the resin material layer 104a, and applying surface modification treatment to promote the curing of the resin material layer 104a, to form the interlayer 104.
    Type: Application
    Filed: September 21, 2007
    Publication date: April 15, 2010
    Applicant: MITSUBISHI KAGAKU MEDIA CO., LTD
    Inventors: Shigeyuki Furomoto, Masafumi Aga, Toshifumi Kawano, Hideharu Takeshima, Yukari Kiritou, Atsushi Komura, Kumi Mizuno, Yumi Matsumura