Patents by Inventor Akinobu KITTAKA

Akinobu KITTAKA 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).

  • Optical semiconductor device package, optical semiconductor device, and manufacturing method for optical semiconductor device package
    Patent number: 11335840
    Abstract: An optical semiconductor device package includes a circuit board in which a first metal, a second metal, and a third metal are sequentially stacked in an optical semiconductor element mounting region. The first metal has a first standard electrode potential. The second metal is disposed on a portion of an upper surface of the first metal and has a second standard electrode potential that is greater than the first standard electrode potential. The third metal is disposed on the upper surface of the first metal and an upper surface of the second metal and has a third standard electrode potential that is greater than the first standard electrode potential and less than the second standard electrode potential.
    Type: Grant
    Filed: April 20, 2020
    Date of Patent: May 17, 2022
    Assignee: PANASONIC INTEILECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Takahiro Fukunaga, Akinobu Kittaka
  • OPTICAL SEMICONDUCTOR DEVICE PACKAGE, OPTICAL SEMICONDUCTOR DEVICE, AND MANUFACTURING METHOD FOR OPTICAL SEMICONDUCTOR DEVICE PACKAGE
    Publication number: 20200251634
    Abstract: An optical semiconductor device package includes a circuit board in which a first metal, a second metal, and a third metal are sequentially stacked in an optical semiconductor element mounting region. The first metal has a first standard electrode potential. The second metal is disposed on a portion of an upper surface of the first metal and has a second standard electrode potential that is greater than the first standard electrode potential. The third metal is disposed on the upper surface of the first metal and an upper surface of the second metal and has a third standard electrode potential that is greater than the first standard electrode potential and less than the second standard electrode potential.
    Type: Application
    Filed: April 20, 2020
    Publication date: August 6, 2020
    Inventors: Takahiro FUKUNAGA, Akinobu KITTAKA