Patent ID: 6144760
Filing Date: 2000-11-07
Classification: G03F,H01J

Abstract:
An exposure data correction method for correcting exposure data relating to layout-designed exposure patterns to correct for a proximity effect in exposure, comprising the steps of:generating an initial hash database by giving hash indices to drawing data of drawing patterns that are obtained by performing calculation processing on the exposure data;extracting drawing data of a target drawing pattern by searching the initial hash database;correcting the drawing data of the target drawing pattern to prevent a proximity effect in exposure;generating a new hash database by giving hash indices to the corrected drawing data;said step of generating an initial hash database further comprising the substeps of:dividing a drawing region in mesh form so that an area of each drawing region in mesh form corresponds to a scattering range of an energy beam that is used in the exposure; andgenerating the initial hash database by giving hash indices to drawing data of drawing patterns that are located in each of the mesh regions, and wherein the drawing data correcting step comprises the substeps of:searching drawing data of a central mesh region where a target mesh region exists and surrounding mesh regions that surround the central mesh region, and judging whether a drawing pattern other than the target drawing pattern exists in the central mesh region or the surrounding regions;performing a mutual proximity effect correction on the drawing data of the target drawing pattern if there exists another drawing pattern; andperforming a self proximity effect correction on the drawing data of the target drawing pattern if there does not exist any other drawing pattern, whereinin the case where the drawing data correction is performed on a drawing pattern for direct drawing exposure of the exposure patterns, the drawing data is at least one of shape data of the drawing pattern and exposure amount data in the exposure,and in the case where the drawing data correction is performed on a drawing pattern for formation of a photomask for forming the exposure patterns, the drawing data is shape data of a drawing pattern for formation of the photomask.