EUV HIGH THROUGHPUT INSPECTION SYSTEM FOR DEFECT DETECTION ON PATTERNED EUV MASKS, MASK BLANKS, AND WAFERS

摘要

Inspection of EUV patterned masks, blank masks, and patterned wafers generated by EUV patterned masks requires high magnification and a large field of view at the image plane. An EUV inspection system can include a light source directed to an inspected surface, a detector for detecting light deflected from the inspected surface, and an optic configuration for directing the light from the inspected surface to the detector. In particular, the detector can include a plurality of sensor modules. Additionally, the optic configuration can include a plurality of mirrors that provide magnification of at least 100X within an optical path less than 5 meters long. In one embodiment, the optical path is approximately 2-3 meters long.