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Sub-100 nm Patterning of Aluminum Film by AFM Local Oxidation

Published online by Cambridge University Press:  17 March 2011

Andrea Notargiacomo ,
Vittorio Foglietti  and
Florestano Evangelisti
Andrea Notargiacomo
Affiliation:
Unitá INFM, Dipartimento di Fisica E. Amaldi, Universitá di Roma TRE, Via della Vasca Navale 84, 00146 Roma, Italy
Vittorio Foglietti
Affiliation:
Istituto di Elettronica dello Stato Solido (IESS) - CNR, Via Cineto Romano 42, 00156 Roma, Italy
Florestano Evangelisti
Affiliation:
Unitá INFM, Dipartimento di Fisica E. Amaldi, Universitá di Roma TRE, Via della Vasca Navale 84, 00146 Roma, Italy Istituto di Elettronica dello Stato Solido (IESS) - CNR, Via Cineto Romano 42, 00156 Roma, Italy
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Abstract

We have investigated the local oxidation of an aluminum film to fabricate aluminum and aluminum oxide masks on Si and SiGe substrates. The local oxidation is made by negatively biasing the probe of an atomic force microscope operating in contact mode. The masks are defined by removing the unwanted material using highly selective etching solutions at room temperature. The produced aluminum-based masks can withstand reactive ion etching processes using fluorinated gases mixtures. We report examples of sub-100 nm pattern transfer on the substrate using the AFM fabricated masks. Preliminary observations suggest to use the sputtered aluminum films for which the anodization is found more efficient than for e-beam evaporated aluminum.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 636: Symposium D – Nonlithographic and Lithographic Methods of Nanofabrication-From Ultralarge Scale , 2000 , D9.29.1
Copyright
Copyright © Materials Research Society 2001

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