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Kinetics of formation of silicides: A review

Published online by Cambridge University Press:  03 March 2011

F. M. d'Heurle
Affiliation:
IBM Research Center, P. O. Box 218, Yorktown Heights, New York 10598
P. Gas
Affiliation:
IBM Research Center, P. O. Box 218, Yorktown Heights, New York 10598
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Abstract

The kinetics of silicide growth are classified into three different categories: (a) diffusion controlled, (b) nucleation controlled, (c) others (reaction rate controlled). These are analyzed with the aim of understanding both the phenomenology of growth and the specific atomic mechanisms of phase formation. Diffusion-controlled growth is discussed with respect to the Nernst-Einstein equation. Stress relaxation is considered as a possible cause of reaction-rate control. The relative merits of two different types of marker experiments are compared. A few silicides are discussed in terms of what can be inferred about diffusion mechanisms. The competition between reaction-rate and diffusion control phenomena is shown to have specific effects on the sequence of phase formation; it is also related to the formation of some amorphous compounds. Reactions between silicon and alloyed metal films are used to illustrate the respective influences of mobility and driving force factors on the kinetics of silicide growth; they can also be used to underline the dominance of nucleation over diffusion in some silicide formation processes.

Type
Commentaries and Rreviews
Copyright
Copyright © Materials Research Society 1986

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References

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