Patents by Inventor Atsushi Masumizu

Atsushi Masumizu 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 including a repair circuit which includes mode fuses
    Patent number: 7826295
    Abstract: In a semiconductor memory device, a repair circuit includes mode fuses to select one of plural repair modes corresponding to plural kinds of defects, respectively. The semiconductor memory device can repair a defective memory cell having operational margin defect without using redundancy memory cells.
    Type: Grant
    Filed: March 13, 2008
    Date of Patent: November 2, 2010
    Assignee: Elpida Memory, Inc.
    Inventors: Atsushi Masumizu, Sadayuki Okuma
  • Semiconductor memory device
    Publication number: 20080225620
    Abstract: In a semiconductor memory device, a repair circuit includes mode fuses to select one of plural repair modes corresponding to plural kinds of defects, respectively. The semiconductor memory device can repair a defective memory cell having operational margin defect without using redundancy memory cells.
    Type: Application
    Filed: March 13, 2008
    Publication date: September 18, 2008
    Applicant: ELPIDA MEMORY, INC.
    Inventors: Atsushi Masumizu, Sadayuki Okuma