摘要 |
PROBLEM TO BE SOLVED: To provide a method for predicting the transfer characteristic of a pattern via a projection optical system in a short time. SOLUTION: A change in the imaged state of the transfer image of a pattern according to a defocus is regarded as a change in the wave front aberration of the projection optical system. In a step 108, respective focus dependency aberration components (Z<SB>4</SB>, Z<SB>9</SB>, Z<SB>16</SB>, Z<SB>25</SB>, Z<SB>36</SB>) are corrected. In a step 112, the value of linear coupling of aberration components (Z<SB>1</SB>-Z<SB>37</SB>) including the corrected focus dependency aberration components (Z<SB>4</SB>, Z<SB>9</SB>, Z<SB>16</SB>, Z<SB>25</SB>, Z<SB>36</SB>) are calculated, and a changeΔCD in the line width of an image of the pattern is predicted. COPYRIGHT: (C)2004,JPO&NCIPI
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