Patents by Inventor Wei Kah Tan

Wei Kah Tan 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-recording medium including a carbon overcoat implanted with nitrogen and hydrogen
    Patent number: 10121506
    Abstract: A magnetic-recording medium includes a hydrogen and nitrogen implanted carbon overcoat (HNICOC) on a magnetic-recording layer. The HNICOC includes nitrogen implanted in a top-surface layer of the HNICOC such that a percentage ratio of a concentration of the implanted nitrogen to a concentration of carbon is between about 30 percent (%) to about 10% within a depth from about 2 ?ngstrom (?) to about 5 ? from the top surface of the HNICOC. An amount of hydrogen implanted in the top-surface layer is between about 1% to about 12% within a distance less than about 5 ? from the top surface. A data storage device that incorporates the magnetic-recording medium within a magnetic-recording disk, and a method for making the magnetic-recording medium are also described.
    Type: Grant
    Filed: December 29, 2015
    Date of Patent: November 6, 2018
    Assignee: WD Media, LLC
    Inventors: Ge Xu, Xiaofeng Yao, Wei Kah Tan