Patent ID: 9390891
Filing Date: 2016-07-12
CPC Classification: H01J

Claim Text:
1. An apparatus for use in a charged particle multi-beam lithography system comprising: a stage for securing a substrate and supporting relative movement between the substrate and an output from a radiation source; the radiation source for producing a beam; charged particle doublets, each of the charged particle doublets having a respective first aperture and configured to demagnify a portion of the beam incident upon the respective first aperture, thereby producing a demagnified beamlet to be directed at the stage; and charged particle lenses, each of the charged particle lenses having a respective second aperture, associated with one of the charged particle doublets, and configured to receive the demagnified beamlet from the associated one of the charged particle doublets and to realize one of two states: a switched-on state, wherein the demagnified beamlet is allowed to travel along a desired path toward the stage, and a switched-off state, wherein the demagnified beamlet is prevented from traveling along the desired path.