Patent ID: 11966169
Assignee: ASML HOLDING N.V.
Field: nan (nan)
Classification: CPC nan | IPC G  H

Claim 14:
15. A system comprising:
a radiation source;
a phased array configured to generate a beam of radiation and to direct the beam toward a target structure on a substrate, the phased array comprising:
optical elements configured to radiate radiation waves,
waveguides configured to guide radiation from the radiation source to the optical elements,
one or more metal elements interposed between the optical elements, and
phase modulators configured to adjust phases of the radiation waves such that the radiation waves accumulate to form the beam;

a detector configured to receive radiation diffracted by the target structure and to generate a measurement signal based on the received radiation, wherein the measurement signal is indicative of an alignment characteristic or an overlay characteristic of the target structure; and
a controller configured to control a phase offset of each respective optical element to control a direction of the beam.