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http://dx.doi.org/10.5757/JKVS.2013.22.5.262

Optimal Determination of the Fabrication Parameters in Focused Ion Beam for Milling Gold Nano Hole Array  

Cho, Eun Byurl (School of Integrated Technology, Yonsei University)
Kwon, Hee Min (School of Integrated Technology, Yonsei University)
Lee, Hee Sun (Yonsei Institute of Convergence Technology, Yonsei University)
Yeo, Jong-Souk (School of Integrated Technology, Yonsei University)
Publication Information
Journal of the Korean Vacuum Society / v.22, no.5, 2013 , pp. 262-269 More about this Journal
Abstract
Though focused ion beam (FIB) is one of the candidates to fabricate the nanoscale patterns, precision milling of nanoscale structures is not straightforward. Thus this poses challenges for novice FIB users. Optimal determination in FIB parameters is a crucial step to fabricate a desired nanoscale pattern. There are two main FIB parameters to consider, beam current (beam size) and dose (beam duration) for optimizing the milling condition. After fixing the dose, the proper beam current can be chosen considering both total milling time and resolution of the pattern. Then, using the chosen beam current, the metal nano hole structure can be perforated to the required depth by varying the dose. In this experiment, we found the adequate condition of $0.1nC/{\mu}m^2$ dose at 1 pA Ga ion beam current for 100 nm thickness perforation. With this condition, we perforated the periodic square array of elliptical nano holes.
Keywords
Focused Ion Beam (FIB); Nano hole array; Nano fabrication;
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