The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 25, 2007
Filed:
Apr. 21, 2004
Henry A. Bonges, Iii, Milton, VT (US);
David C. Reynolds, Essex Junction, VT (US);
James E. Sundquist, Colchester, VT (US);
Henry A. Bonges, III, Milton, VT (US);
David C. Reynolds, Essex Junction, VT (US);
James E. Sundquist, Colchester, VT (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method of performing latch up check on an integrated circuit (IC) design that comprises rasterizing a conductor region shape and contact shapes and iteratively expanding the contact shapes within the conductor region shape using a cellular algorithm. Direction values for contact cells can be used to limit the number of neighboring cells which must be explored. In every fourth iteration of the expansion process, corner cells may not be expanded. Reachable areas outside of conductors can also be explored.