Computer-aided manufacturing and focused ion beam technology enable machining of complex micro- and nano-structures

Nanotechnology
Frank Niessen, Mitchell J B Nancarrow

Abstract

We present a novel framework for the fabrication of geometrically complex structures at the micro- and nano-scale which relies on the synergy of integrated computer-aided design and manufacturing systems (CAD/CAM) and focused ion beam (FIB) technology in a scanning electron microscope. Here we utilise industry standard G-code syntax, for the first time, to FIB machining by designing geometries with CAD, defining machining strategies and exporting G-codes with CAM and generating a coordinate list-based beam path by using a custom-built interpreter program. This allows the fabrication of complex structures from CAD models using syntax which is readily understood in the general fabrication industry. The use of G-code allows optimization of the beam path towards a reduction of beam blanking operations and tracing of contours, leading to minimized re-deposition of material. We give a detailed description of the method, use an application example to demonstrate advantages and prospects of the approach and provide the free and open-source interpreter program CAM2FIB for application of this method. We contrast and compare various existing available milling strategies and demonstrate the versatility of G-code based programming.

References

Nov 25, 2000·Science·H G Craighead
Mar 13, 2008·IEEE Transactions on Nanobioscience·V RaffaP Dario
Sep 27, 2014·Micron : the International Research and Review Journal for Microscopy·Alexander EifertChristine Kranz
Jun 6, 2017·Micron : the International Research and Review Journal for Microscopy·Daniele De FelicisEdoardo Bemporad
May 29, 2018·Optics Express·Sergey Gorelick, Alex De Marco
May 1, 2019·Applied Microbiology and Biotechnology·Évelin F WigmannLudwig Niessen

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Citations

Aug 30, 2020·Materials·Amalio Fernández-PachecoOleksandr V Dobrovolskiy
Dec 31, 2020·Micromachines·Mariachiara ManoccioVittorianna Tasco
Apr 24, 2021·Beilstein Journal of Nanotechnology·Victor DeinhartKatja Höflich

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