Patents by Inventor Laurice Thorsen Earl

Laurice Thorsen Earl 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).

  • Patent number: 6063132
    Abstract: A method using a generate-and-verify computer program product to generate by repetitive passes a design rules checking computer program, wherein the design rules are described in a file called a runset. The design rules checking program is used for exhaustive testing of VLSI chips for compliance to the design rules of a given VLSI fabrication process. The runset is repeatedly iterated in loop fashion with respect to a testcase file containing groups of layout structures or shapes used for verifying the correctness of the runset. A general purpose shapes processing program creates an error shapes file for storing geometrical errors found in each said layout structure. Two additional shapes are used in the verification process: user boundary shapes for defining areas in which errors are not to be detected for a given design rule, and automated boundary shapes created to surround each said layout structure with a boundary that defines regions where error shapes can occur.
    Type: Grant
    Filed: June 26, 1998
    Date of Patent: May 16, 2000
    Assignee: International Business Machines Corporation
    Inventors: William Frantz DeCamp, Laurice Thorsen Earl, Jason Steven Minahan, James Robert Montstream, Daniel John Nickel, Joseph James Oler, Jr., Richard Quimby Williams