Patent ID: 9123507
Filing Date: 2015-09-01
Classification: B82Y,F15D,G03F,G21K,H01J,Y10T

Abstract:
1. Electron beam lithography system comprising: a beamlet generator for generating a plurality of electron beamlets; a plurality of beamlet manipulator elements for manipulating the electron beamlets, at least one of the beamlet manipulator elements comprising an aperture array; a plasma generator comprising a chamber in which a plasma may be formed, the chamber comprising an inlet for receiving an input gas, and one or more outlets for removal of at least one of the plasma and radicals created therein; a hollow guiding body for guiding radicals formed in the plasma towards the aperture array at which contaminant deposition is to be removed; and a pressure regulator having an inlet with a first cross-sectional area, and an outlet with a second cross-sectional area, the first cross-sectional area being greater than the second cross-sectional area, the pressure regulator inlet being coupled to the one or more chamber outlets, the pressure regulator outlet being coupled to the guiding body, wherein the chamber is provided with a flow restrictor.