Patents by Inventor Yuzo Akada

Yuzo Akada 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: 7208206
    Abstract: A glass crack prevention laminate has a glass crack prevention adhesive layer having a dynamic storage elastic modulus G? of not larger than 1×107 Pa at 20° C., and a liquid crystal display optical film laminated on a surface of the glass crack prevention adhesive layer. Particularly, the liquid crystal display optical film is made of a polarizing plate or of a laminate of a polarizing plate and another optical layer. The thickness of the glass crack prevention adhesive layer is selected to be in a range of from 0.1 mm to 5 mm. The glass crack prevention adhesive layer has removability. The adhesive agent-including optical film having the configuration can be directly mounted on a liquid crystal panel so that the glass crack prevention adhesive layer is provided on an inner side. Thus, a liquid crystal display device can be provided.
    Type: Grant
    Filed: March 8, 2004
    Date of Patent: April 24, 2007
    Assignee: Nitto Denko Corporation
    Inventors: Yoshihiro Hieda, Yuzo Akada, Toshitsugu Hosokawa, Kazuhiko Miyauchi
  • Publication number: 20040180148
    Abstract: A glass crack prevention laminate has a glass crack prevention adhesive layer having a dynamic storage elastic modulus G′ of not larger than 1×107 Pa at 20° C., and a liquid crystal display optical film laminated on a surface of the glass crack prevention adhesive layer. Particularly, the liquid crystal display optical film is made of a polarizing plate or of a laminate of a polarizing plate and another optical layer. The thickness of the glass crack prevention adhesive layer is selected to be in a range of from 0.1 mm to 5 mm. The glass crack prevention adhesive layer has removability. The adhesive agent-including optical film having the configuration can be directly mounted on a liquid crystal panel so that the glass crack prevention adhesive layer is provided on an inner side. Thus, a liquid crystal display device can be provided.
    Type: Application
    Filed: March 8, 2004
    Publication date: September 16, 2004
    Applicant: NITTO DENKO CORPORATION
    Inventors: Yoshihiro Hieda, Yuzo Akada, Toshitsugu Hosokawa, Kazuhiko Miyauchi
  • Patent number: 6623594
    Abstract: A sheet for holding and protecting semiconductor wafers which can closely follow up even a wafer surface having large roughness is disclosed. The hot-melt sheet for holding and protecting semiconductor is applied to a surface of a semiconductor wafer to thereby hold and protect the semiconductor wafer in processing the semiconductor wafer. The sheet comprises a hot-melt layer A having a melting point of 105° C. or below. A pressure-sensitive adhesive layer B may be formed on one surface of the hot-melt layer A. A reinforcing layer C having a melting point higher by 20° C. or more than that of hot-melt layer A may further be formed on one surface of the hot-melt layer A, provided that when the pressure-sensitive adhesive layer B is formed on one surface of the hot-melt layer A, the reinforcing layer C is formed on the opposite surface thereof.
    Type: Grant
    Filed: July 8, 1999
    Date of Patent: September 23, 2003
    Assignee: Nitto Denko Corporation
    Inventors: Kazuhiko Yamamoto, Yuzo Akada
  • Patent number: 5476565
    Abstract: A dicing-die bonding film comprising an ultraviolet-transmitting substrate having provided thereon an ultraviolet-curable pressure-sensitive adhesive layer and an adhesive layer in this order, the pressure-sensitive adhesive layer having been partly ultraviolet-cured to have cured parts and uncured parts. The film has a well-balanced combination of a holding power for supporting a semiconductor wafer during dicing and release properties for enabling cut chips to be easily released together with the adhesive layer so that even large-sized chips as larger than 10 mm.times.10 mm can easily be picked up.
    Type: Grant
    Filed: January 12, 1994
    Date of Patent: December 19, 1995
    Assignee: Nitto Denko Corporation
    Inventors: Yuzo Akada, Koji Akazawa, Keiji Nakamoto
  • Patent number: 5304418
    Abstract: A dicing-die bonding film comprising an ultraviolet-transmitting substrate having provided thereon an ultraviolet-curable pressure-sensitive adhesive layer and an adhesive layer in this order, the pressure-sensitive adhesive layer having been partly ultraviolet-cured to have cured parts and uncured parts. The film has a well-balanced combination of a holding power for supporting a semiconductor wafer during dicing and release properties for enabling cut chips to be easily released together with the adhesive layer so that even large-sized chips as larger than 10 mm.times.10 mm can easily be picked up.
    Type: Grant
    Filed: December 30, 1992
    Date of Patent: April 19, 1994
    Assignee: Nitto Denko Corporation
    Inventors: Yuzo Akada, Koji Akazawa, Keiji Nakamoto