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  4. Full tungsten and platinum nanoprobes for electrically conducting scanning probe methods
 
conference paper not in proceedings

Full tungsten and platinum nanoprobes for electrically conducting scanning probe methods

Steen, J  
•
Harada, T
•
Ishii, M
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2006
The 8th Korean MEMS Conference

We have developed hybrid AFM probes with SU-8 polymer body and full platinum and tungsten cantilever and tip. The fabrication process uses surface micromachining of a (100) silicon wafer. The metal (platinum or tungsten) is sputter deposited in oxidation sharpened moulds, giving a final tip sharpness smaller than 20 nm. A SU-8 body is subsequently formed. The release is either done by a wet back-side or dry top-side process. The measured hardness of the tungsten and platinum film values 14.8 GPa and 7.3 GPa, respectively. Contact resistances on a gold sample show 25 Ohm and 10 Ohm for the tungsten and platinum probes, respectively. The results are promising for the development of a robust electrically conducting probe.

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