A catalytic alloy approach for graphene on epitaxial SiC on silicon wafers

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Iacopi, Francesca
Mishra, Neeraj
Cunning, Benjamin Vaughan
Goding, Dayle
Dimitrijev, Sima
Brock, Ryan
Dauskardt, Reinhold H
Wood, Barry
Boeckl, John
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2015
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Abstract

We introduce a novel approach to the synthesis of high-quality and highly uniform few-layer graphene on silicon wafers, based on solid source growth from epitaxial 3C-SiC films. Using a Ni/Cu catalytic alloy, we obtain a transfer-free bilayer graphene directly on Si(100) wafers, at temperatures potentially compatible with conventional semiconductor processing. The graphene covers uniformly a 2? silicon wafer, with a Raman ID/IG band ratio as low as 0.5, indicative of a low defectivity material. The sheet resistance of the graphene is as low as 25 O/square, and its adhesion energy to the underlying substrate is substantially higher than transferred graphene. This work opens the avenue for the true wafer-level fabrication of microdevices comprising graphene functional layers. Specifically, we suggest that exceptional conduction qualifies this graphene as a metal replacement for MEMS and advanced on-chip interconnects with ultimate scalability.

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Journal of Materials Research

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30

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5

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© 2015 Cambridge University Press. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher. Please refer to the journal's website for access to the definitive, published version.

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Condensed matter physics

Materials engineering

Functional materials

Mechanical engineering

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