Patent ID: 11869743
Assignee: KLA CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A system comprising:
an electron beam source that generates an electron beam, wherein the electron beam source includes a tip, a suppression electrode, and an extraction electrode;
an acceleration tube disposed in a path of the electron beam, wherein the acceleration tube has an entrance and an exit opposite the entrance, and wherein the entrance receives the electron beam from the electron beam source;
a beam-limiting aperture disposed in the acceleration tube, wherein the beam-limiting aperture is near the entrance proximate the electron beam source;
an anode disposed in the path of the electron beam between the electron beam source and the acceleration tube;
a focusing lens disposed in the path of the electron beam downstream from the beam-limiting aperture; and
a micro aperture array disposed in the path of the electron beam downstream from the acceleration tube and the focusing lens, wherein the micro aperture array is configured to generate a plurality of beamlets from the electron beam.