Patent ID: 6055045
Filing Date: 2000-04-25
Classification: G03F

Abstract:
A method for characterizing at least one photorepeater and at least one series of reference patterns reproduced on several regions of a standard wafer, the method comprising steps of:making a standard reticle defining a first series of at least three identical reference patterns, which are not aligned;successively exposing, through the standard reticle, the several regions of the standard wafer to a light source of the at least one photorepeater by varying an illumination dose from one region to another;developing the standard wafer to reproduce the first series of reference patterns on the standard wafer in the several exposed regions;measuring, for each exposed region of the several exposed regions, a developed dimension of each reference pattern of the first series;determining, for each illumination dose, a mean dimension of the reference patterns in each exposed region based on the developed dimensions; andperforming a linear interpolation of the mean dimensions.