Patents by Inventor Motoaki Matumoto

Motoaki Matumoto 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 having redundancy
    Patent number: 4733372
    Abstract: Herein disclosed is a bipolar memory having redundancy, which can be produced with a small area. In this semiconductor memory having a body memory for storing data and a spare memory for relief of fault bit of the body memory, a row is selected by cutting fuses in a decoder. Fundamentally signal lines such as word lines are not provided with fuses. Other parts including a power source and a reference voltage source are provided with fuses without decreasing the operating speed accompanied by only a slight increase in the area.
    Type: Grant
    Filed: August 6, 1986
    Date of Patent: March 22, 1988
    Assignees: Hitachi, Ltd., Hitachi Device Eng.
    Inventors: Hiroaki Nanbu, Kunihiko Yamaguchi, Noriyuki Honma, Kazuo Kanetani, Motoaki Matumoto, Kazuhiko Tani, Kenichi Ohata