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Ion Beam Induced Intermixing of Wsi0.45 on GaAs

Published online by Cambridge University Press:  25 February 2011

S. J. Pearton ,
K. T. Short ,
K. S. Jones ,
A. G. Baca  and
C. S. Wu
S. J. Pearton
Affiliation:
AT&T Bell Laboratories, Murray Hill, NJ 07974
K. T. Short
Affiliation:
AT&T Bell Laboratories, Murray Hill, NJ 07974
K. S. Jones
Affiliation:
University of Florida, Gainesville, FL 32611
A. G. Baca
Affiliation:
AT&T Bell Laboratories, Reading, PA 19603
C. S. Wu
Affiliation:
Hughes Aircraft Co., Torrance CA 90509
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Abstract

The systematics of ion beam induced intermixing of WSi0.45 on GaAs have been studied after through-implantation of Si or O in the dose range 1013 − 5 × 1016 cm−2. SIMS profiling shows significant knock-on of Si and W into the GaAs at the high dose range in accordance with Monte Carlo simulations, but there is virtually no electrical activation (≤0.1%) of this Si after normal implant annealing (900°C, 10 sec). This appears to be a result of the high level of disorder near the metal-semiconductor interface, which is not repaired by annealing. This damage consists primarily of dislocation loops extending a few hundred angstroms below the end of range of the implanted ions. Extrapolation of the ion doses used in this work to the usual doses used in GaAs device fabrication would imply that ion-induced intermixing of WSix will not be significant in through-implantation processes.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 128: Symposium A – Processing and Characterization of Materials Using Ion Beams , 1988 , 249
Copyright
Copyright © Materials Research Society 1989

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References

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