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Impurity Activation in N+ Ion-Implanted 6H-SiC with Pulsed Laser Annealing Method

Published online by Cambridge University Press:  21 March 2011

O. Eryu ,
K. Aoyama ,
K. Abe  and
K. Nakashima
O. Eryu
Affiliation:
Department of Electrical and Computer Engineering Nagoya Institute of Technology, Nagoya 466–8555, Japan
K. Aoyama
Affiliation:
Department of Electrical and Computer Engineering Nagoya Institute of Technology, Nagoya 466–8555, Japan
K. Abe
Affiliation:
Department of Electrical and Computer Engineering Nagoya Institute of Technology, Nagoya 466–8555, Japan
K. Nakashima
Affiliation:
Department of Electrical and Computer Engineering Nagoya Institute of Technology, Nagoya 466–8555, Japan
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Abstract

We have succeeded in pulsed laser annealing of N+ ion-implanted n-type 6H-SiC for increasing the carrier density near surface in order to decrease contact resistance, which induces little redistribution of implanted impurities after laser irradiation. By repeated laser irradiation at low energy density, the ion–implanted impurities were electrically activated without melting the surface region. SiC substrates with impurity concentration of 2×1018 /cm3 were implanted with 30 keV N+ ions with dose of 4.7×1013/cm2. After pulsed laser annealing, a contact resistance was measured to be 5.7×10−5 Ωcm2 using Al electrode on the N+ -implanted layer.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 640: Symposium H – Silicon Carbide-Materials, Processing, and Devices , 2000 , H5.31
Copyright
Copyright © Materials Research Society 2001

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References

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