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:
Aug. 02, 2005
Filed:
May. 21, 2003
Chin-chi Teng, Sunnyvale, CA (US);
Eddy Pramono, Santa Clara, CA (US);
Chin-Chi Teng, Sunnyvale, CA (US);
Eddy Pramono, Santa Clara, CA (US);
Cadence Design Systems, Inc., San Jose, CA (US);
Abstract
An RC extraction tool estimates capacitances of conductors residing along parallel grid lines on each of a set vertically stacked layers of insulating material of an IC based on data contained in a IC layout file describing positions of structures forming the IC. The tool initially processes the layout file to generate a separate database for each layer. Each database includes a separate table for each grid line on its corresponding layer, and each table includes a separate entry for each conductor residing along that grid line containing data indicating dimensions and a position of its corresponding conductor along that grid line. The tool processes the databases for each layer in ascending order to estimate capacitances between conductors on that layer and to generate set of data structures mapping the amount of conductor surface area on that layer to areas of layers above that layer, and to areas of layers below that layer in which conductors reside. The tool then processes the data structures to estimate capacitances between conductors on nearby layers.