Patent ID: 8984451
Filing Date: 2015-03-17
Classification: B82Y,G06F,H01J

Abstract:
1. A method for fracturing a surface into elementary features, comprising, via a computer: preparing said elementary features to be each exposed to at least one shot of a variable shaped beam (VSB) to transfer a free-form desired pattern onto the surface, determining a topological skeleton of the free-form desired pattern; utilizing as parameters, VSB tool available directions; simulating a contour of a fractured design; determining a distance between the simulated contour of the fractured design and a contour of the free-form desired pattern; and defining said elementary features as rectangles substantially centered on the topological skeleton of the free-form desired pattern and having an available direction substantially parallel to a VSB tool available direction, said rectangles having each a size which is maximal under a constraint that the distance between the simulated contour of the fractured design and a contour of the free-form desired pattern stays within a predetermined roughness tolerance.