Patents by Inventor Koicho Fukuda

Koicho Fukuda 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).

  • Publication number: 20080205137
    Abstract: A semiconductor memory device includes a memory cell array, a voltage generating circuit, a memory circuit which stores a reference pulse number of an advance-write voltage of the memory cell array and a parameter, and a control circuit which controls, when a pulse number of the advance-write voltage is less than the reference pulse number of the advance-write voltage, the voltage generating circuit in a manner to decrease at least an initial value of a write voltage and a step-up width of the write voltage in accordance with the parameter.
    Type: Application
    Filed: July 16, 2007
    Publication date: August 28, 2008
    Inventors: Kosuke Yanagidaira, Koicho Fukuda, Takahiko Hara