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

Claim 6:
7. An imaging ellipsometry (IE)-based inspection method comprising:
selecting a mode from among a first mode of an imaging ellipsometry (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;
measuring an inspection target by the IE-based inspection device in the selected mode, the inspection target being a semiconductor chip;
obtaining a two-dimensional (2D) image for each wavelength of patterns included in a plurality of cells of the inspection target by an IE-based inspection device; and
extracting intensity data of each wavelength from the 2D image of each wavelength,
wherein the obtaining of the 2D image for each wavelength comprises simultaneously measuring the patterns included in the plurality of cells,
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, in the second mode, a two-dimensional image of an entire region of the semiconductor chip is obtained based on performing imaging one time, 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.