Patents by Inventor Hai Nam Pham

Hai Nam Pham 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).

  • Logic circuit and single-electron spin transistor
    Patent number: 7851877
    Abstract: A logic circuit that can reconfigure its functions in a nonvolatile manner and a single-electron transistor to be used in the logic circuits are provided. The logic circuit has a single-electron spin transistor that includes: a source; a drain; an island that is provided between the source and the drain, and has tunnel junctions between the island and the source and drain; and a gate that is capacitively coupled to the island. In this logic circuit, at least one of the source, the drain, and the island includes a ferromagnetic material having a variable magnetization direction.
    Type: Grant
    Filed: February 2, 2006
    Date of Patent: December 14, 2010
    Assignee: Japan Science and Technology Agency
    Inventors: Masaaki Tanaka, Satoshi Sugahara, Hai Nam Pham
  • Logic Circuit and Single-Electron Spin Transistor
    Publication number: 20090039401
    Abstract: A logic circuit that can reconfigure its functions in a nonvolatile manner and a single-electron transistor to be used in the logic circuits are provided. The logic circuit has a single-electron spin transistor that includes: a source; a drain; an island that is provided between the source and the drain, and has tunnel junctions between the island and the source and drain; and a gate that is capacitively coupled to the island. In this logic circuit, at least one of the source, the drain, and the island includes a ferromagnetic material having a variable magnetization direction.
    Type: Application
    Filed: February 2, 2006
    Publication date: February 12, 2009
    Applicant: JAPAN SCIENCE AND TECHNOLOGY AGENCY
    Inventors: Masaaki Tanaka, Satoshi Sugahara, Hai Nam Pham