A method of extracting capacitance from a layout record includes imposing
voltages on conductors in a layout record, and determining a total charge
for each of the conductors to obtain a capacitor element for the
conductors. A method of extracting capacitance from a layout record
includes matching a configuration of conductors in a layout record
against a reference pattern, and determining an extracted capacitance for
the conductors based at least in part on the reference pattern. A method
of extracting capacitance from a layout record includes providing a
layout record of a circuit design, the layout record having data
representing conductors and metal fill, and extracting capacitance to
determine a set of capacitors between the conductors, the set of
capacitors accounting for the metal fill.