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J. Vac. Sci. Technol. B 28, 304 (2010); http://dx.doi.org/10.1116/1.3308974 (6 pages)

Large area direct-write focused ion-beam lithography with a dual-beam microscope a

a This paper was presented at the 53rd International Conference Electron, Ion, and Photon Beam Technology and Nanofabrication Conference held in Marco Island, FL, May 26–29, 2009.
Alexandra Imre1, Leonidas E. Ocola1, Lauren Rich2, and Joseph Klingfus3

1Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439
2Department of Physics, Missouri University of Science and Technology, Rolla, Missouri 65409
3Raith USA, Ronkonkoma, New York 11779

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(Published online 22 March 2010)

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The authors have investigated the performance of focused ion-beam (FIB) direct-write lithography for large area (multiple write-field) patterning in an FEI Nova Nanolab 600 dual-beam microscope. Their system is configured with a 100 nm resolution X-Y stage and a RAITH ELPHY LITHOGRAPHY control interface, with its own integrated 16 bit DAC pattern generator and software. Key issues with regard to configuration, process parameters, and procedures have been addressed. Characterization of stitching errors, pattern repeatability, and drift were performed. Offset lithography (multiple exposures with offset write fields) and in-field registration marks were evaluated for correcting stitching errors, and a test microfluidic device covering an area of 1×1.4 mm2 was successfully fabricated. The authors found that by using a combination of offset lithography and in-field registration mark correction methods, the stitching errors can be kept well below 100 nm. They also found that due to higher beam deflection speed provided by the electrostatic scanning in FIB systems versus the wide-spread electron-beam systems with electromagnetic scanning, FIB lithography can be just as fast as electron-beam lithography for typical mill depths down to about 200–500 nm (material dependent). This opens the door for a large suite of applications for materials where pattern transfer is difficult or impossible by reactive methods.

© 2010 American Vacuum Society

ACKNOWLEDGMENTS

The authors would like to thank Oliver Wilhelmi, Paul Anzalone, Laurent Roussel, Steve Neptune, and Lucille Giannuzzi from FEI Co., and Jason Sanabria from Raith USA for insightful discussions on FIB milling. This work was supported by the UChicago Argonne, LLC and the Department of Energy under Contract No. DE-AC02-06CH11357. Use of the Center for Nanoscale Materials was supported by the U. S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357.

Article Outline

  1. INTRODUCTION
  2. EXPERIMENT
  3. RESULTS AND DISCUSSION
  4. SUMMARY

KEYWORDS and PACS

PACS

  • 85.40.Hp

    Lithography, masks and pattern transfer

  • 85.85.+j

    Micro- and nano-electromechanical systems (MEMS/NEMS) and devices

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PUBLICATION DATA

ISSN

1071-1023 (print)  
1520-8567 (online)

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