Patent ID: 11874237
Assignee: NOVA MEASURING INSTRUMENTS INC.
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 0:
1. A method of measuring a sample by X-ray reflectance scatterometry, the method comprising:
directing an X-ray generated within a first sub-chamber through a X-ray transmissive region that is formed between the first-sub chamber and a second sub-chamber towards a sample having a periodic structure and located within a second sub-chamber to generate a scattered X-ray beam, the incident X-ray beam simultaneously providing a plurality of incident angles and a plurality of azimuthal angles;
suppressing, by a magnetic electron suppression device that is positioned within the first sub-chamber, electrons emitted, in addition to the X-ray, from the X-ray source as a result of illumination of the X-ray source with an electron beam from an electron gun;
and
collecting at least a portion of the scattered X-ray beam.