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:
Feb. 06, 2001
Filed:
Mar. 10, 1998
Laura Rohwedder Darden, Essex, VT (US);
James John Engel, Cambridge, VT (US);
Peter Anton Habitz, Hinesburg, VT (US);
William John Livingstone, Cambridge, VT (US);
Daniel Joseph Mainiero, Austin, TX (US);
Jeannie Harrigan Panner, Underhill, VT (US);
Michael Timothy Trick, Essex, VT (US);
Paul Steven Zuchowski, Cambridge, VT (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A computerized tool or method that calculates the capacitance and resistance of each global wire on the chip, one wire at a time. The invention steps along a track containing a wire segment, grid point by grid point, calculating the resistance and capacitance at that point. At each grid point it searches the neighboring tracks within the surrounding cube for adjacent elements that could cause capacitive effects or affect the resistance of the wire. The method delivers capacitance and resistance values for each process condition for a grid unit length of wire, given the wire type and 3 dimensional environment of the wire segment. The capacitance and resistance at a grid point along the wire are generally determined by one table lookup for wire types based on the surrounding environment. These values are added along wire segments to deliver accurate 3 dimensional capacitances and resistances. The invention can also provide for wires and spaces of various types and widths not provided for in the tables and for calculation of net to net coupling capacitances.