Abstract
In this paper, we report a micromachining of titanium using a desktop DRIE and fabrication of microstructure. We found out high speed exhaust characteristic is indispensable in the etching of titanium, and the etching rate more than 0.2 µm/min (a maximum rate is 0.4 µm/min) was provided in a small amount of etching gas (SF6). As the demonstration of the method, we fabricated microneedles imitating mosquito's proboscis. We revealed that it is available for fabricating precision microstructure. Titanium has excellent mechanical property and corrosion resistance, and it is expected to be used as a material for MEMS. In this method, it is expected to apply to fabricate the three-dimensional structures.
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