Patents by Inventor Akihiko Uedo

Akihiko Uedo 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).

  • Diamond Electron Emission Cathode, Electron Emission Source, Electron Microscope, And Electron Beam Exposure Device
    Publication number: 20080164802
    Abstract: An object of the present invention is to provide an electron emission cathode and an electron emission source using diamond and having a high brightness and a small energy width that are used in electron beam and electron beam devices and vacuum tubes, in particular, electron microscopes and electron beam exposure devices, and electronic devices that uses such electron emission cathode and electron emission source. A diamond electron emission cathode according to the present invention has single crystal diamond in at least part thereof, the diamond electron emission cathode being in a columnar form having a sharpened acute section in one place of an electron emitting portion and being constituted by at least two types of semiconductors that differ in electric properties.
    Type: Application
    Filed: June 19, 2006
    Publication date: July 10, 2008
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Yoshiki Nishibayashi, Akihiko Uedo, Yoshiyuki Yamamoto, Takahiro Imai