Patents by Inventor Satoshi Sekigahama

Satoshi Sekigahama 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).

  • Wafer carrier
    Patent number: 5195729
    Abstract: A carrier for a semiconductor wafer or other substrate has an outer portion adapted for engagement by equipment for processing wafers. Interior to the outer portion a substantially planar supporting surface is provided. A retaining lip is provided above the plane in which the supporting surface lies by at least the height of a wafer of a selected size. The circumference of the retaining lip is of sufficient size and proper shape to permit the passage of a wafer of the selected size. The carrier is undercut under the lip, whereby a wafer of the selected size, when placed on the supporting surface, may be retained.In one embodiment, the carrier has a cylindrical shape. The top of the carrier includes a flat outer ring-like surface. The supporting surface and the circumference of the retaining lip are both circular.
    Type: Grant
    Filed: May 17, 1991
    Date of Patent: March 23, 1993
    Assignee: National Semiconductor Corporation
    Inventors: Michael E. Thomas, Satoshi Sekigahama, Richard von Salza Brown