Patents by Inventor Chor Boon Ang

Chor Boon Ang 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 disk and magnetic disk manufacturing method
    Patent number: 7993497
    Abstract: In a magnetic disk having at least a glass substrate, a plurality of underlayers formed over the glass substrate, and a magnetic layer formed over the plurality of underlayers, at least one of the underlayers is an amorphous underlayer containing a VIa group element and carbon and, given that the remanent magnetization in a circumferential direction of the disk is Mrc and the remanent magnetization in a radial direction of the disk is Mrr, the magnetic disk has a magnetic anisotropy in which Mrc/Mrr being a ratio between Mrc and Mrr exceeds 1.
    Type: Grant
    Filed: November 21, 2006
    Date of Patent: August 9, 2011
    Assignee: WD Media (Singapore) Pte. Ltd.
    Inventors: Keiji Moroishi, Chor Boon Ang