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

Claim 9:
10. A method of fabricating a semiconductor device, the 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 a wafer by the IE-based inspection device in the selected mode;
determining whether the wafer is normal based on a result of the measuring; and
based on determining that the wafer is normal, performing a semiconductor process on the wafer,
wherein the measuring of the wafer comprises simultaneously measuring patterns included in a plurality of cells provided in a region of the wafer, the region corresponding to an FOV of the selected mode,
wherein the wafer 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 wafer is provided,
wherein, in the second mode, a two-dimensional image of an entire region of a semiconductor chip included in the wafer is obtained based on performing imaging one time,
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.