Patent ID: 7802225

Claim:
An optical proximity correction method of performing optical proximity correction on a design pattern for a semiconductor device including a transistor as a component thereof, said method comprising: a first step of extracting a gate length distribution of a gate from a pattern shape of the gate of a transistor to be formed on a wafer; a second step of calculating electric characteristics of the gate from which the gate length distribution has been extracted in the first step; a third step of determining a gate length of a rectangular gate having electric characteristics equivalent to the electric characteristics calculated in said second step; a fourth step of calculating a corrective coefficient for describing an associated relationship between a statistical value of the gate length distribution extracted in said first step and the gate length determined in said third step; a fifth step of extracting a gate length distribution of a gate of a transistor formed on the wafer by printing said design pattern, and calculating a gate length distribution representative value from the statistical value of the gate length distribution using the corrective coefficient calculated in said fourth step; and a sixth step of correcting said design pattern so that the gate length distribution representative value calculated in said fifth step will be a specification value; wherein steps one through six are performed by means of computer or an apparatus with a computer function.