Patent ID: 6514648
Filing Date: 2003-02-04
Classification: G03F

Abstract:
The method for determining optical proximity effects of critical dimension metrology tools, comprising the steps of:exposing a first portion of a first photoresist layer on a substrate corresponding to a first feature that is to be formed in said first photoresist layer; exposing at least one compensating portion of said first photoresist layer adjacent said first portion to form at least one compensating feature such that exposing said compensating feature at least partially exposes said first feature; exposing a nested portion of said first photoresist layer corresponding to a nested feature that is to be formed in said first photoresist layer corresponding to said first portion; exposing a number of surrounding portions of said first photoresist layer adjacent said nested portion to form surrounding features such that the number and arrangement of said surrounding features corresponds to the number and arrangement of said at least one compensating feature with respect to said first portion, resulting in said first feature and said nested feature having substantially similar dimensions; removing said at least one compensating feature; measuring the dimensions of said first feature and said nested feature with said metrology tool; determining a difference between said measured dimensions of said first feature and said nested feature to determine the optical proximity effects of said metrology tool.