A Micromachined Ionic Liquid Ion Source with Flow-Controlled Segmented Annular Channels

A Micromachined Ionic Liquid Ion Source with Flow-Controlled Segmented Annular Channels
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具有流量控制分段环形通道的微机械离子液体离子源

DOI:
10.1109/transducers.2019.8808471
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发表时间:
2019
期刊:
Proceedings of IEEE Transducers 2019
影响因子:
--
通讯作者:
Kuwano Hiroki
Kuwano Hiroki
中科院分区:
--
文献类型:
--
作者:
Chinh Nguyen-Van;Minh Le-Van;Ono Takahito;Kuwano Hiroki

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In this work, we present a micromachined fluorine-based ion source (IS) for nano-/micro-processing applications. Our proposed structure is composed of an out-of-plane Si micro-emitter surrounded by four segmented annular micro-channels. The segmented channels were implemented to control the ionic liquid (IL) flow supplied to the tip emitter, enabling to broaden the working regime and overcome the droplet emission which was observed in the conventional ionic liquid ion source (ILIS). The 1-ethyl-3-methylimidazolium tetrafluoroborate (EMIM-BF4) IL was used to produce reactive fluorine-based ions. The ILIS enabled to emit the fluorine-based ions without droplets for a wide range of voltage supply from 2.8 kV to 5 kV. The ion source was demonstrated for patterning a Si structure with the maximum etching rate of 150 μm3.μA-1.min-1.
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