Resolution performance of programmable proximity aperture MeV ion beam lithography system

Sergey Gorelick, Timo Sajavaara, Mikko Laitinen, Nitipon Puttaraksa, Harry J. Whitlow

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

1 Citation (Scopus)


An ion beam lithography system for light and heavy ions has been developed at the University of Jyväskylä's Accelerator Laboratory. The system employs a programmable proximity aperture to define the beam. The proximity aperture is made up of four Ta blades with precise straight edges that cut the beam in the horizontal and vertical directions. The blade positions and dimensions are controlled by a pair of high-precision linear-motion positioners. The sample is mounted on a X-Y-Z stage capable of moving with 100 nm precision steps under computer control. The resolution performance of the system is primarily governed by the proximity aperture. Pattern edge sharpness is set by the beam divergence, aperture blade straightness, and secondary and scattered particles from the aperture blade edges. Ray tracing simulations using object oriented toolkit GEANT4 were performed to investigate the beam spatial resolution on the sample defined by the proximity aperture. The results indicate that the edge-scattering does not significantly affect the pattern edge sharpness.

Original languageEnglish
Title of host publicationIon-Beam-Based Nanofabrication
Number of pages6
Publication statusPublished - 1 Dec 2007
Externally publishedYes
EventIon-Beam-Based Nanofabrication - San Francisco, CA, United States of America
Duration: 10 Apr 200712 Apr 2007


ConferenceIon-Beam-Based Nanofabrication
Country/TerritoryUnited States of America
CitySan Francisco, CA

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