Patent ID: 9208989
Filing Date: 2015-12-08
Classification: H01J

Abstract:
1. A charged particle lithography system for transferring a pattern onto the surface of a target, such as a wafer, comprising: a charged particle source adapted for generating a diverging charged particle beam; a converging means for refracting said diverging charged particle beam, the converging means comprising a first electrode; and an aperture array element comprising a plurality of apertures, the aperture array element forming a second electrode, wherein the second electrode is arranged to split the charged particle beam into a plurality of charged particle beamlets; wherein the system is adapted for creating an electric field between the first electrode and the second electrode, wherein the aperture array of the second electrode is subdivided into alternating aperture-free areas and areas where a plurality of apertures are present, and wherein the aperture free areas are provided with conduits for a cooling medium.