Patent ID: 8653485
Filing Date: 2014-02-18
Classification: B82Y,H01J

Abstract:
1. A charged particle multi-beamlet lithographic system for exposing a target using a plurality of beamlets, the system comprising: a beamlet generator for generating a plurality of beamlets; a beamlet blanker for controllably blanking beamlets; and an array of projection lens systems for projecting unblanked beamlets onto the surface of the target; wherein the beamlet generator comprises: at least one charged particle source for generating a charged particle beam; a sub-beam generator for defining a plurality of sub-beams from the charged particle beam; a sub-beam manipulator array for influencing the sub-beams; and an aperture array for defining beamlets from the sub-beams; wherein the aperture array is arranged for defining a group of individual beamlets from each of the sub-beams.