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Structural and Electrical Characterization of U Ltra-Thin SiO2 Grown on Hydrogen-Terminated Silicon Surfaces

Published online by Cambridge University Press:  21 February 2011

M. Hirose ,
T. Yasaka ,
M. Hiroshima ,
M. Takakura  and
S. Miyazaki
M. Hirose
Affiliation:
Department of Electrical Engineering, Hiroshima University, Higashi-Hiroshima 724, Japan
T. Yasaka
Affiliation:
Department of Electrical Engineering, Hiroshima University, Higashi-Hiroshima 724, Japan
M. Hiroshima
Affiliation:
Department of Electrical Engineering, Hiroshima University, Higashi-Hiroshima 724, Japan
M. Takakura
Affiliation:
Department of Electrical Engineering, Hiroshima University, Higashi-Hiroshima 724, Japan
S. Miyazaki
Affiliation:
Department of Electrical Engineering, Hiroshima University, Higashi-Hiroshima 724, Japan
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Abstract

The surface microroughness of Si(100) wafers has been studied by FT-IR-ATR. The final wafer clean in an 0.1% HF + 1% H2O2 aqueous solution significantly improves the hydrogenterminated surface morphology as demonstrated by a sharp SiH2 stretching vibration peak accompanied with the weak SiH and SiH3 peaks. The ultra-thin gate oxide grown on such surface exhibits nearly ideal tunneling current transport. The cleaning in 4.5% HF reduces the SiH2 peak height and enhances SiH3, making the surface rough. Nevertheless, the tunneling characteristics are hardly influenced with such spectral change.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 315: Symposium Y – Surface Chemical Cleaning and Passivation for Semiconductor Processing , 1993 , 367
Copyright
Copyright © Materials Research Society 1993

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References

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