Patents by Inventor Zhengsheng Shan

Zhengsheng Shan 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).

  • Magnetic media with improved exchange coupling
    Patent number: 7070870
    Abstract: A magnetic recording medium includes a substrate, an underlayer, a lower magnetic layer formed on the underlayer, an intermediate layer, and an upper magnetic layer formed on the intermediate layer. The intermediate layer is typically Ru, and promotes anti ferromagnetic coupling between the upper and lower magnetic layers. The upper and lower magnetic layers are typically Co alloys. The lower magnetic layer has a high saturation magnetization Ms to promote high exchange coupling between the upper and lower magnetic layers. The dynamic coercivity of the lower magnetic layer is lower than the exchange field to ensure rapid switching of the lower magnetic layer.
    Type: Grant
    Filed: February 1, 2005
    Date of Patent: July 4, 2006
    Assignee: Komag, Inc.
    Inventors: Gerardo Bertero, Sudhir Malhotra, David Wachenschwanz, Zhengsheng Shan, Donald Stafford
  • Magnetic media with improved exchange coupling
    Publication number: 20050129984
    Abstract: A magnetic recording medium includes a substrate, an underlayer, a lower magnetic layer formed on the underlayer, an intermediate layer, and an upper magnetic layer formed on the intermediate layer. The intermediate layer is typically Ru, and promotes anti ferromagnetic coupling between the upper and lower magnetic layers. The upper and lower magnetic layers are typically Co alloys. The lower magnetic layer has a high saturation magnetization Ms to promote high exchange coupling between the upper and lower magnetic layers. The dynamic coercivity of the lower magnetic layer is lower than the exchange field to ensure rapid switching of the lower magnetic layer.
    Type: Application
    Filed: February 1, 2005
    Publication date: June 16, 2005
    Inventors: Gerardo Bertero, Sudhir Malhotra, David Wachenschwanz, Zhengsheng Shan, Donald Stafford
  • Magnetic media with improved exchange coupling
    Patent number: 6899959
    Abstract: A magnetic recording medium includes a substrate, an underlayer, a lower magnetic layer formed on the underlayer, an intermediate layer, and an upper magnetic layer formed on the intermediate layer. The intermediate layer is typically Ru, and promotes antiferromagnetic coupling between the upper and lower magnetic layers. The upper and lower magnetic layers are typically Co alloys. The lower magnetic layer has a high saturation magnetization Ms to promote high exchange coupling between the upper and lower magnetic layers. The dynamic coercivity of the lower magnetic layer is lower than the exchange field to ensure rapid switching of the lower magnetic layer.
    Type: Grant
    Filed: February 12, 2002
    Date of Patent: May 31, 2005
    Assignee: Komag, Inc.
    Inventors: Gerardo Bertero, Sudhir Malhotra, David Wachenschwanz, Zhengsheng Shan, Donald Stafford
  • Magnetic media with improved exchange coupling
    Publication number: 20030152805
    Abstract: A magnetic recording medium includes a substrate, an underlayer, a lower magnetic layer formed on the underlayer, an intermediate layer, and an upper magnetic layer formed on the intermediate layer. The intermediate layer is typically Ru, and promotes antiferromagnetic coupling between the upper and lower magnetic layers. The upper and lower magnetic layers are typically Co alloys. The lower magnetic layer has a high saturation magnetization Ms to promote high exchange coupling between the upper and lower magnetic layers. The dynamic coercivity of the lower magnetic layer is lower than the exchange field to ensure rapid switching of the lower magnetic layer.
    Type: Application
    Filed: February 12, 2002
    Publication date: August 14, 2003
    Applicant: Komag, Inc.
    Inventors: Gerardo Bertero, Sudhir Malhotra, David Wachenschwanz, Zhengsheng Shan, Donald Stafford