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Production of Silicon Powder by Square-Wave Modulated Rf Silane Plasma

Published online by Cambridge University Press:  25 February 2011

J. Costa ,
G. Sardin ,
J. Campmany ,
J.L. AndÚjar ,
A. Canillas  and
E. Bertran
J. Costa
Affiliation:
Departament de Física Aplicada i Electrònica, Universitat de Barcelona Av.Diagonal 647, E08028 Barcelona (Spain)
G. Sardin
Affiliation:
Departament de Física Aplicada i Electrònica, Universitat de Barcelona Av.Diagonal 647, E08028 Barcelona (Spain)
J. Campmany
Affiliation:
Departament de Física Aplicada i Electrònica, Universitat de Barcelona Av.Diagonal 647, E08028 Barcelona (Spain)
J.L. AndÚjar
Affiliation:
Departament de Física Aplicada i Electrònica, Universitat de Barcelona Av.Diagonal 647, E08028 Barcelona (Spain)
A. Canillas
Affiliation:
Departament de Física Aplicada i Electrònica, Universitat de Barcelona Av.Diagonal 647, E08028 Barcelona (Spain)
E. Bertran
Affiliation:
Departament de Física Aplicada i Electrònica, Universitat de Barcelona Av.Diagonal 647, E08028 Barcelona (Spain)
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Abstract

Silicon powder has been produced by means of square-wave modulated rf silane plasma. The plasma conditions were: 30°C of reaction chamber temperature, 70 Pa of pressure, 80 W of rf power and 0. 1 Hz of square-wave modulation frequency. The gas flow rate was varied from 5 to 90 sccm.

The distribution and size of the powder grains were determined by transmission electron microscopy. The compositional and microstructural analysis of the powder was performed by FTIR spectroscopy. This analysis has revealed the dominant presence of SiH2 groups (2100 cm−1), in a highly polymeric form (850 and 890 cm−1), as well as the existence of an absorption band (1000-1100 cm−1) associated with oxidation of the powder.

These results have shown the great influence of the flow rate, through the gas residence time, on the composition and microstructure of silicon powder.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 286: Symposium J – Nanophase and Nanocomposite Materials , 1992 , 155
Copyright
Copyright © Materials Research Society 1993

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References

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