Patents by Inventor Hiromi Sasaoka

Hiromi Sasaoka 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 device including a phase-change memory element
    Patent number: 8513638
    Abstract: A semiconductor device may include, but is not limited to: a first insulating film; a second insulating film over the first insulating film; a first memory structure between the first and second insulating films; and a third insulating film between the first and second insulating films. The first memory structure may include, but is not limited to: a heater electrode; and a phase-change memory element between the heater electrode and the second insulating film. The phase-change memory element contacts the heater electrode. The third insulating film covers at least a side surface of the phase-change memory element. Empty space is positioned adjacent to at least one of the heater electrode and the third insulating film.
    Type: Grant
    Filed: September 2, 2011
    Date of Patent: August 20, 2013
    Assignee: Elpida Memory, Inc.
    Inventors: Tomoyasu Kakegawa, Isamu Asano, Tsuyoshi Kawagoe, Hiromi Sasaoka, Naoya Higano, Yuta Watanabe
  • Semiconductor device
    Publication number: 20120056148
    Abstract: A semiconductor device may include, but is not limited to: a first insulating film; a second insulating film over the first insulating film; a first memory structure between the first and second insulating films; and a third insulating film between the first and second insulating films. The first memory structure may include, but is not limited to: a heater electrode; and a phase-change memory element between the heater electrode and the second insulating film. The phase-change memory element contacts the heater electrode. The third insulating film covers at least a side surface of the phase-change memory element. Empty space is positioned adjacent to at least one of the heater electrode and the third insulating film.
    Type: Application
    Filed: September 2, 2011
    Publication date: March 8, 2012
    Applicant: ELPIDA MEMORY, INC.
    Inventors: Tomoyasu Kakegawa, Isamu Asano, Tsuyoshi Kawagoe, Hiromi Sasaoka, Naoya Higano, Yuta Watanabe