Patents by Inventor Katsumi Suizu

Katsumi Suizu 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 with increased capacitance of capacitor and manufacturing method thereof
    Patent number: 5172201
    Abstract: Disclosed is a stacked capacitor type semiconductor memory device having an increased capacitance of a capacitor. An upward projection member projecting upward is provided on an interlayer insulation film. A storage node is provided on the interlayer insulation film to cover the upward projection member. A capacitor insulation film is provided to cover the storage node. A cell plate electrode is provided to cover the capacitor insulation film. With such a semiconductor memory device, the storage node is formed to cover the upward projection member provided on the interlayer insulation film, thereby to increase a surface area of the storage node.
    Type: Grant
    Filed: September 18, 1990
    Date of Patent: December 15, 1992
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Katsumi Suizu