Patent ID: 11961705
Assignee: CARL ZEISS SMT GMBH
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 31:
32. A method for examining a beam of charged particles, the method comprising:
producing persistent interactions of the beam with a sample at a plurality of positions of the sample relative to the beam, wherein the persistent interactions comprise beam-induced etching of a part of the surface of the sample using at least one etching gas, and varying one or more parameters of the beam-induced etching to cause the beam-induced etching of the part of the surface of the sample to become saturated with respect to a beam intensity in a core region of the beam of charged particles; and
deriving at least one property of the beam by analyzing the spatial distribution of the persistent interactions at the plurality of positions;
wherein at least some of the plurality of positions of the sample are arranged at different points in the direction of propagation of the beam by adjusting the position of the sample while keeping beam optics parameters constant.