Patents by Inventor Peter F. Schoen

Peter F. Schoen 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).

  • High contrast alignment marker for integrated circuit fabrication
    Patent number: 4374915
    Abstract: A wafer marker is described for aligning masks with the wafer. The marker comprises a depression in the wafer which is defined by sloped sides and a pitted bottom. The sloped sides and pitted bottom do not directly reflect light as does the surface of the surrounding silicon and thus the marker appears as a darker region. The bottom of the depression is pitted by exposing the anode during a silicon plasma etching step.
    Type: Grant
    Filed: July 30, 1981
    Date of Patent: February 22, 1983
    Assignee: Intel Corporation
    Inventors: C. Norman Ahlquist, Yaw Wen Hu, Peter F. Schoen, Paul A. Poenisch
  • Storage device
    Patent number: D439249
    Type: Grant
    Filed: April 28, 2000
    Date of Patent: March 20, 2001
    Assignee: Western Digital Corp.
    Inventors: Lester C. Anderson, Hilario P. Agbulos, Jr., Peter F. Schoen, John K. Ramones, Badir M. Mousa, Henry A. Jupille, Daniel Ong Kwang Keen, Tan Kai Song, Michael T. Milo