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

Claim 15:
16. An extreme ultraviolet (EUV) lithography device comprising:
an EUV light source;
a field facet mirror configured to reflect light from the EUV light source;
a pupil facet mirror configured to receive light reflected from the field facet mirror and reflect the received light to a mask; and
a controller configured to:
assign a priority to the pupil facet mirror based on a target image corresponding to a rendering of an illumination optical system by assigning a value to each position of facets of the pupil facet mirror, and
assign the field facet mirror as the pupil facet mirror to which the priority is assigned using linear programming based on the assigned values to each position of the facets of the pupil facet mirror.