Patent ID: 6379851
Filing Date: 2002-04-30
Classification: B82Y,H01J,Y10S

Abstract:
A method of agglomerating flashes during energy beam lithography comprising:a) defining a cell on the lithography substrate upon impact of a first flash with said substrate, wherein said cell has a predetermined delimiting radius, a predetermined delimiting age, a charge centroid at the center of said first flash and a time centroid at the time of writing of said first flash; and, b) writing a subsequent flash; and, c) determining if a termination condition has occurred; and, d) if a termination condition has not occurred, i) replacing said charge centroid with a revised charge centroid wherein said revised charge centroid is a charge-weighted average of said charge centroid and the charge centroid of said subsequent flash; and, ii) replacing said time centroid with a revised time centroid wherein said revised time centroid is a charge-weighted average of said time centroid and the time centroid of said subsequent flash; and, iii) writing a subsequent flash as in step (b) and repeating steps (c) and (d) hereof until a termination condition occurs; and, e) if a termination condition has occurred, storing the charge written in said cell, the time centroid of said cell and the charge centroid of said cell.