Extreme ultraviolet laser-based table-top aerial image metrology of lithographic masks

Optics Express
F BrizuelaC S Menoni

Abstract

We have realized the first demonstration of a table-top aerial imaging microscope capable of characterizing pattern and defect printability in extreme ultraviolet lithography masks. The microscope combines the output of a 13.2 nm wavelength, table-top, plasma-based, EUV laser with zone plate optics to mimic the imaging conditions of an EUV lithographic stepper. We have characterized the illumination of the system and performed line-edge roughness measurements on an EUVL mask. The results open a path for the development of a compact aerial imaging microscope for high-volume manufacturing.

Citations

Jul 12, 2011·Applied Optics·Patrick P NaulleauKenneth A Goldberg
Jul 10, 2012·Optics Express·Michael Goldstein, Patrick Naulleau

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