Patent ID: 11887807
Assignee: ASML NETHERLANDS B.V.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 11:
12. A non-transitory computer-readable medium storing a set of instructions that is executable by at least one processor of an apparatus to cause the apparatus to perform operations to form a plurality of probe spots in a scanning charged particle microscope, the operations comprising:
generating a primary charged particle beam by a source;
collimating the primary electron beam by a condenser lens to be perpendicularly incident onto a source conversion unit;
forming, by the source conversion unit, a plurality of beamlets from the primary charged particle beam by
directing the plurality of beamlets towards a primary optical axis of the scanning charged particle microscope using at least two different deflection angles by a plurality of electron optics elements in the source conversion units; and
limiting currents of the plurality of beamlets by a plurality of beam-limit openings of the source conversion unit.