Patent ID: 11960212
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. An operating method of an extreme ultraviolet (EUV) lithography device, the method comprising:
defining a target image to render an illumination system;
assigning priorities to respective positions of facets of a pupil facet mirror corresponding to the target image, wherein the assigning priorities to the respective positions of the facets of the pupil facet mirror comprises assigning a value to each position of the facets of the pupil facet mirror;
assigning a mirror according to the assigned priorities using linear programming based on the assigned values to each position of the facets of the pupil facet mirror;
generating the illumination system by selecting one of the facets of the pupil facet mirror based on a symmetry criterion; and
converting mirror assignment information and source map information corresponding to the selected facet into a form recognizable by an EUV scanner.