Patents by Inventor Youichi Kai

Youichi Kai 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).

  • Nonvolatile semiconductor memory
    Patent number: 7839679
    Abstract: A nonvolatile semiconductor memory according to an aspect of the invention includes memory cell arrays including plural cell units, a power supply pad disposed on one end in a first direction of the memory cell arrays, and page buffers disposed in the first direction of the memory cell arrays. The nonvolatile semiconductor memory also includes plural bit lines which are disposed on the memory cell arrays while extending in the first direction and a first power supply line which is disposed on the plural bit lines on the memory cell arrays to connect the power supply pad and the page buffers.
    Type: Grant
    Filed: March 6, 2008
    Date of Patent: November 23, 2010
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Koji Hosono, Masahiro Yoshihara, Dai Nakamura, Youichi Kai
  • NONVOLATILE SEMICONDUCTOR MEMORY
    Publication number: 20080225591
    Abstract: A nonvolatile semiconductor memory according to an aspect of the invention includes memory cell arrays including plural cell units, a power supply pad disposed on one end in a first direction of the memory cell arrays, and page buffers disposed in the first direction of the memory cell arrays. The nonvolatile semiconductor memory also includes plural bit lines which are disposed on the memory cell arrays while extending in the first direction and a first power supply line which is disposed on the plural bit lines on the memory cell arrays to connect the power supply pad and the page buffers.
    Type: Application
    Filed: March 6, 2008
    Publication date: September 18, 2008
    Inventors: Koji Hosono, Masahiro Yoshihara, Dai Nakamura, Youichi Kai