Patents by Inventor Michael Zyee-Shan Wu

Michael Zyee-Shan Wu 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).

  • Corrosion resistant granular magnetic stack
    Patent number: 8728637
    Abstract: A corrosion-resistant granular magnetic recording medium with improved recording performance comprises a non-magnetic substrate having a surface; and a layer stack on the substrate surface, including, in order from the surface: a granular magnetic recording layer; an intermediate magnetic de-coupling layer; and a corrosion preventing magnetic cap layer. The intermediate magnetic de-coupling layer has an optimal thickness and/or composition for: (1) promoting magnetic exchange de-coupling between the granular magnetic recording layer and the magnetic cap layer; and (2) reducing the dynamic closure field (Hcl) for determining writeability and eraseability of the medium. Grain boundaries of the magnetic cap layer are substantially oxide-free, and have a greater density and lower average porosity and surface roughness than those of the granular magnetic recording layer.
    Type: Grant
    Filed: January 14, 2010
    Date of Patent: May 20, 2014
    Assignee: Seagate Technology LLC
    Inventors: Michael Zyee-Shan Wu, Mason Lu, Kueir W. Chour, Connie C. Liu, Edward T. Yen, Lynn Li, Steve Hwang
  • CORROSION-RESISTANT GRANULAR MAGNETIC MEDIA WITH IMPROVED RECORDING PERFORMANCE AND METHODS OF MANUFACTURING SAME
    Publication number: 20100119877
    Abstract: A corrosion-resistant granular magnetic recording medium with improved recording performance comprises a non-magnetic substrate having a surface; and a layer stack on the substrate surface, including, in order from the surface: a granular magnetic recording layer; an intermediate magnetic de-coupling layer; and a corrosion preventing magnetic cap layer. The intermediate magnetic de-coupling layer has an optimal thickness and/or composition for: (1) promoting magnetic exchange de-coupling between the granular magnetic recording layer and the magnetic cap layer; and (2) reducing the dynamic closure field (Hcl) for determining writeability and eraseability of the medium. Grain boundaries of the magnetic cap layer are substantially oxide-free, and have a greater density and lower average porosity and surface roughness than those of the granular magnetic recording layer.
    Type: Application
    Filed: January 14, 2010
    Publication date: May 13, 2010
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Michael Zyee-Shan Wu, Mason Lu, Kueir W. Chour, Connie C. Liu, Edward T. Yen, Lynn Li, Steve Hwang
  • Corrosion-resistant granular magnetic media with improved recording performance and methods of manufacturing same
    Patent number: 7691499
    Abstract: A corrosion-resistant granular magnetic recording medium with improved recording performance comprises a non-magnetic substrate having a surface; and a layer stack on the substrate surface, including, in order from the surface: a granular magnetic recording layer; an intermediate magnetic de-coupling layer; and a corrosion preventing magnetic cap layer. The intermediate magnetic de-coupling layer has an optimal thickness and/or composition for: (1) promoting magnetic exchange de-coupling between the granular magnetic recording layer and the magnetic cap layer; and (2) reducing the dynamic closure field (Hcl) for determining writeability and eraseability of the medium. Grain boundaries of the magnetic cap layer are substantially oxide-free, and have a greater density and lower average porosity and surface roughness than those of the granular magnetic recording layer.
    Type: Grant
    Filed: April 21, 2006
    Date of Patent: April 6, 2010
    Assignee: Seagate Technology LLC
    Inventors: Michael Zyee-Shan Wu, Mason Lu, Kueir W. Chour, Connie C. Liu, Edward T. Yen, Lynn Li, Steve Hwang