Patents by Inventor Laddawan Supadee

Laddawan Supadee 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).

  • Testing workpiece overcoat
    Patent number: 8623197
    Abstract: A method and apparatus for testing workpiece overcoats is described.
    Type: Grant
    Filed: December 20, 2010
    Date of Patent: January 7, 2014
    Assignee: Western Digital (Fremont), LLC
    Inventors: Worawarit Kobsiriphat, Laddawan Supadee, Krisda Siangchaew
  • Method and system for fabricating a cavity in a substrate of a magnetic recording head
    Patent number: 8343363
    Abstract: A method for fabricating an air-bearing surface (ABS) in a substrate having a surface is described. The substrate is for a magnetic recording head. The method includes providing a mask on the surface of substrate. The mask has an edge adjacent to a portion of the substrate exposed by the mask. The method also includes forming a taper in the portion of the substrate adjacent to the edge. The taper has an angle from the surface of the substrate of at least thirty degrees and not more than seventy degrees. The method also includes performing a reactive ion etching (RIE) to remove the portion of the substrate to form a cavity in the substrate. The angle of the taper is configured to substantially eliminated redeposition from the RIE on the edge.
    Type: Grant
    Filed: March 10, 2010
    Date of Patent: January 1, 2013
    Assignee: Western Digital (Fremont), LLC
    Inventors: Chupong Pakpum, Laddawan Supadee