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

Opt Express. 2010 Jul 5;18(14):14467-73. doi: 10.1364/OE.18.014467.

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.

Publication types

  • Research Support, U.S. Gov't, Non-P.H.S.