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. 17, 2009
Filed:
Mar. 06, 2006
Andrew Siegel, Shoreline, WA (US);
Steven Teig, Menlo Park, CA (US);
Hussein Etawil, Santa Clara, CA (US);
Andrew Siegel, Shoreline, WA (US);
Steven Teig, Menlo Park, CA (US);
Hussein Etawil, Santa Clara, CA (US);
Cadence Design Systems, Inc., San Jose, CA (US);
Abstract
Some embodiments provide an analytical placement method that considers diagonal wiring. This method formulates an objective function that accounts for the use of diagonal wiring during routing. Some embodiments use horizontal, vertical, and ±45° diagonal lines. For such a wiring model, some embodiments use the following objective function: In this equation, n represents a net, p(n) represents a unique pair of pins i and j of the net n, x and y represent the x-, and y-coordinates of a particular pin, and brepresents a weighting factor that biases the function based on the desired closeness of pins i and j.