| 摘要 |
A diagonal-capacitance calculating unit calculates diagonal capacitance based on the adjacent wirings in diagonally upward and downward direction from a target wiring. A basic-capacitance correcting unit corrects basic capacitance, which is wiring capacitance based on adjacent wirings in above, below, on a left of, and on a right of the target wiring, based on the adjacent wirings in diagonally upward and downward direction from the target wiring. A total-capacitance calculating unit adds up the diagonal capacitance calculated and the basic capacitance corrected, to calculate wiring capacitance of the target wiring.
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