Patents by Inventor Ching Hian Hee

Ching Hian Hee 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).

  • Tilted media for hard disk drives and magnetic data storage devices
    Patent number: 7144640
    Abstract: A digital storage medium for use in data storage devices has two magnetic layers where the respective easy axes of the magnetic moments in the two layers are perpendicular to each other. Exchange coupling of the magnetic moments in the magnetic layers produces a resultant magnetic moment that is tilted out of the plane of the digital storage medium. The resultant magnetic moment of the medium allows the use of either a ring head, a single pole head, or a head that generates a field tilted at an angle for write operations.
    Type: Grant
    Filed: August 1, 2003
    Date of Patent: December 5, 2006
    Assignee: Agency for Science, Technology and Research
    Inventors: Ching Hian Hee, Jian Ping Wang, Haibao Zhao