Patents by Inventor Ao Fan

Ao Fan 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).

  • Disk hub for retaining magnetic recording media for film thickness measurement
    Patent number: 11651793
    Abstract: A disk hub is configured to retain a magnetic recording medium including an annulus shape and a layer configured for magnetic recording. The disk hub includes a base plate portion for supporting an inner diameter area of the magnetic recording medium and a stem portion on the base plate portion. The stem portion includes a frustoconical portion on the base plate portion and a top portion on the frustoconical portion. At least the top portion of the stem portion includes a material with a hardness less than that of stainless steel. The disk hub can reduce surface damages (e.g., scratches) on the media surface during media testing.
    Type: Grant
    Filed: January 5, 2022
    Date of Patent: May 16, 2023
    Assignee: Western Digital Technologies, Inc.
    Inventors: Lingyun Li, Ao Fan, Cheng Zhang