Patent ID: 7137088

Claim:
A system for determining a signal coupling coefficient of a line in a substrate represented in a circuit design database, the system comprising: electronic design automation tool for designing the substrate; and line signal coupling coefficient logic for determining the signal coupling coefficient of a target line designed by the electronic design automation tool and contained in the circuit design database, the line signal coupling coefficient logic comprising: target net/line identification logic for identifying the target line; create virtual 3-D window logic for creating a virtual 3-D window around the target line for determining a universe of at least one neighboring line; determine line segment signal coupling coefficient logic for determining the signal coupling coefficient of the target line based on the target line and the neighboring lines; logic for creating a capacitive matrix containing capacitance of the target line and each line in the universe of neighboring lines; and logic for calculatin a K factor by dividing a sum of capacitance of non-ground lines mutual to the target line by a sum of capacitance of the target line to ground and the sum of the capacitance of the non-ground lines mutual to the target line.