Patents by Inventor Katsuyuki Doumae

Katsuyuki Doumae 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).

  • Lead frame
    Patent number: 9583422
    Abstract: A lead frame, as one product unit in a multi-row lead frame sharing a partition frame among other lead frames, has a non-mirrorsymmetric pad region and at least one terminal region arranged inside and held to a rectangular outer frame region, which is a part of the partition frame and forms a boundary of the lead frame as a product unit, via respective suspension leads. Only two suspension leads hold the non-mirrorsymmetric pad region to the outer frame region as extending from opposite sides of the outer frame region to the non-mirrorsymmetric pad region, respectively. This structure decreases stress resulting from holding of the non-mirrorsymmetric pad region to the outer frame region and thus can prevent the outer frame region from deformation without widened connecting bars or dambars, which form the outer frame region.
    Type: Grant
    Filed: January 21, 2016
    Date of Patent: February 28, 2017
    Assignees: SH MATERIALS CO., LTD., NICHIA CORPORATION
    Inventors: Katsuyuki Doumae, Yoshio Ichihara, Shimpei Sasaoka
  • LEAD FRAME
    Publication number: 20160218051
    Abstract: A lead frame, as one product unit in a multi-row lead frame sharing a partition frame among other lead frames, has a non-mirrorsymmetric pad region and at least one terminal region arranged inside and held to a rectangular outer frame region, which is a part of the partition frame and forms a boundary of the lead frame as a product unit, via respective suspension leads. Only two suspension leads hold the non-mirrorsymmetric pad region to the outer frame region as extending from opposite sides of the outer frame region to the non-mirrorsymmetric pad region, respectively. This structure decreases stress resulting from holding of the non-mirrorsymmetric pad region to the outer frame region and thus can prevent the outer frame region from deformation without widened connecting bars or dambars, which form the outer frame region.
    Type: Application
    Filed: January 21, 2016
    Publication date: July 28, 2016
    Inventors: Katsuyuki Doumae, Yoshio Ichihara, Shimpei Sasaoka