Patent ID: 11972960
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 0:
1. An imaging ellipsometry (IE)-based inspection method comprising:
selecting a mode from among a first mode of an IE-based inspection device having a first field of view (FOV) and a second mode of the IE-based inspection device having a second FOV; and
measuring an inspection target by the IE-based inspection device in the selected mode,
wherein the measuring of the inspection target comprises simultaneously measuring patterns included in a plurality of cells provided in a region of the inspection target, the region corresponding to an FOV of the selected mode,
wherein the inspection target is measured in a large-area mode corresponding to the second mode that is operated by a tilted optical system comprising a second detector that is inclined with respect to a stage on which the inspection target is provided,
wherein the inspection target is a semiconductor chip,
wherein the second detector is configured to obtain a two-dimensional image of an entire region of the semiconductor chip based on performing imaging one time in the second mode, and
wherein an overlay for each region of the semiconductor chip is determined by averaging overlay values measured on the entire region of the semiconductor chip.