Patent ID: 7847918
Filing Date: 2010-12-07
Classification: G03B

Abstract:
1. A designing method on performing pattern formation, comprising: carrying out a step of estimating a manufacturing process margin by a simulation with a condition of illuminating an exposure light in the first illumination state to a photomask; and carrying out a second step after carrying out a first step, or carrying out the first step after carrying out the second step, when the manufacturing process margin, estimated based on design data of the pattern formation, does not satisfy a reference value, wherein the first step is a step of changing a design layout of the pattern to satisfy an allowable range in a first illumination state when estimating the manufacturing process margin, the second step is a step of changing an illumination state by performing a simulation of adjusting a light intensity distribution of irradiation light which is irradiated to a photomask to be in a second illumination state in which a plurality of double pole illuminations or a plurality of quadrupole illuminations are combined at positions differing from each other so that the manufacturing process margin satisfies the reference value of the pattern in a design layout of the pattern when estimating the manufacturing process margin, in which when carrying out the above steps, a plurality of double pole illuminations in the second illumination state are formed by locating a plurality of illumination pairs symmetrically with respect to a central portion, and the distance between the illuminations is different with each of the illumination pairs, and a plurality of quadrupole illuminations in the second illumination state are formed by locating a plurality of quadrupole of illuminations symmetrically with respect to a central portion, and the distance between the two opposing illuminations is different with each quadrupole illumination.