Patent ID: 7754401
Filing Date: 2010-07-13
Classification: B82Y,G03F,H01J,Y10S

Abstract:
1. A method for manufacturing a surface using charged particle beam lithography, the method comprising: inputting a desired pattern to be formed on the surface; determining a plurality of variable shaped beam (VSB) shots, wherein shots in the plurality of shots are allowed to overlap each other, and wherein the union of any subset of the plurality of VSB shots, each shot in the subset being oversized or being undersized or being the originally-determined size, is different than the desired pattern; calculating a calculated pattern on the surface from the plurality of VSB shots; revising the plurality of VSB shots and recalculating the calculated pattern if the calculated pattern differs from the desired pattern by more than a predetermined tolerance; and forming the pattern on the surface with the plurality of VSB shots.