Patents by Inventor Yasuki Sonoda

Yasuki Sonoda 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
    Patent number: 8878320
    Abstract: According to one embodiment, a semiconductor memory device includes plural magneto-resistance elements being two-dimensionally arrayed on a semiconductor substrate. In the semiconductor memory device, each of the magneto-resistance elements includes: a first magnetic layer formed on the semiconductor substrate; a non-magnetic layer formed on the first magnetic layer; and a second magnetic layer formed on the non-magnetic layer, and an insulating film buried between the magneto-resistance elements adjacent to each other, a powder made of a metallic material or a magnetic material being dispersed in the insulating film.
    Type: Grant
    Filed: March 20, 2012
    Date of Patent: November 4, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Koji Yamakawa, Daisuke Ikeno, Yasuki Sonoda