AIMS® EUV is a unique tool in the EUV mask infrastructure. It allows qualification of the mask printing performance in the aerial image under scanner equivalent conditions. For emulation of the high NA EUV scanner, ZEISS upgraded the existing 0.33 NA AIMS® EUV platform. The system can now emulate both 0.33 NA isomorphic scanners as well as 0.55 NA anamorphic scanners. We present the concept of AIMS® EUV high NA with focus on the emulation of a wafer defocus in the anamorphic high NA scanner. Besides defect review applications, this enables aerial image based high NA imaging studies.
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