Patent ID: 11972922
Assignee: ASML NETHERLANDS B.V.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A non-transitory computer-readable medium comprising instructions that, when executed by one or more processors, cause operations comprising:
selecting a plurality of arbitrary regions on a wafer;
preparing, on each of the plurality of arbitrary regions, a pattern including a first periodic structure interleaved with a second periodic structure, the first and second periodic structures having an induced offset;
tracing pitches of the first and second periodic structures and the induced offset on each of the plurality of arbitrary regions;
measuring, by a scanning electron microscope (SEM), the pitches of the first and second periodic structures on each of the plurality of arbitrary regions; and
performing a linearity calibration on the SEM based on the tracing and the measuring.