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

Claim 1:
2. A system for measuring a sample by X-ray reflectance scatterometry, the system comprising:
a first sub-chamber;
a second sub-chamber;
an X-ray source that is located within the first sub-chamber and is configured to generate an X-ray beam that passes through a X-ray transmissive region formed between the first-sub chamber and the second sub-chamber;
a sample holder located within the second-sub-chamber and is configured to position a sample having a periodic structure;
optics positioned between the X-ray source and the sample holder, the optics is configured to focus the X-ray beam to provide an incident X-ray beam to the sample, the incident X-ray beam simultaneously having a plurality of incident angles and a plurality of azimuthal angles;
a magnetic electron suppression device positioned within the first sub-chamber; wherein the magnetic electron suppression device is configured to suppress 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
a detector that is configured to collect at least a portion of a scattered X-ray beam from the sample.