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Patterning of Silicide Layers by Local Oxidation

Published online by Cambridge University Press:  15 February 2011

M. Dolle ,
S. Mantl ,
M. Hacke ,
S. T. Mesters  and
H. L. Bay
M. Dolle
Affiliation:
Institut für Schicht- und Ionentechnik, KFA Jülich, D-52428 Jülich, Germany
S. Mantl
Affiliation:
Institut für Schicht- und Ionentechnik, KFA Jülich, D-52428 Jülich, Germany
M. Hacke
Affiliation:
Institut für Schicht- und Ionentechnik, KFA Jülich, D-52428 Jülich, Germany
S. T. Mesters
Affiliation:
Institut für Schicht- und Ionentechnik, KFA Jülich, D-52428 Jülich, Germany
H. L. Bay
Affiliation:
Institut für Schicht- und Ionentechnik, KFA Jülich, D-52428 Jülich, Germany
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Abstract

A novel method for patterning of silicide layers based on local oxidation is presented. We investigated unifom and local oxidation of epitaxial CoSi2 layers on Si(100). During thermal oxidation of CoSi2 a SiO2 surface layer forms and the silicide layer moves deeper into the substrate. Single crystalline CoSi2 layers on Si(100) remain single crystalline even if they are shifted into the substrate several hundred nm. Local oxidation of such a silicide layer allows lateral patterning of the silicide. The oxidized regions of the silicide layer are pushed inwards and separate from the surface layer at a critical oxidation time. This allows the formation of buried patterned silicides or metallized mesa structures. The technique seems to be also applicable for polycrystalline silicides.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 402: Symposium H – Silicide Thin Films-Fabrication, Properties and Applications , 1995 , 549
Copyright
Copyright © Materials Research Society 1996

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