| 摘要 |
PROBLEM TO BE SOLVED: To provide in a short time a method for calculating wiring capacitance which allows calculation of a wiring capacitance in a high-integrated chip. SOLUTION: A wiring length LX of a wiring to be laid out is compared to a preset linear approximation possible limit wiring length LR (S104), and when the wiring length LX is longer than the linear approximation possible limit wiring length LR, a pre-set unit wiring capacitance CR (S105) is multiplied by the wiring length LX to calculate a wiring capacitance parasitic at the wiring (S106). When the wiring length LX is shorter than the linear approximation possible limit wiring length LR, the wiring is divided into a plurality of very short wiring parts and added with a wiring capacitance acquired for each of wiring parts, for calculating a wiring capacitance (S107). For the wiring of a long wiring length, a conventional process, wherein the wiring is divided into a plurality of very short wiring parts and added with a wiring capacitance acquired for each of wiring parts for calculating the wiring capacitance of wiring, is omitted. for reduced number of calculation processes, which result in a quick calculation.
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