Patents by Inventor Akihiko Nitayama

Akihiko Nitayama 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).

  • Semiconductor memory device having a stack-type capacitor
    Patent number: 5414655
    Abstract: A semiconductor device of this invention includes a semiconductor substrate, at least one memory cell section including a number of memory cells each formed of a capacitor and a MOS transistor formed on the semiconductor substrate, a peripheral circuit section formed on the semiconductor substrate in an area other than an area in which the memory cell section is formed, and a wiring layer serving as an upper electrode of the capacitor and serving as a wire of the peripheral circuit section.
    Type: Grant
    Filed: July 16, 1993
    Date of Patent: May 9, 1995
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tohru Ozaki, Hiroshi Takato, Akihiko Nitayama