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Silicon carbide formation by methane plasma immersion ion implantation into silicon

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6 Author(s)
An, Zhenghua ; Department of Physics and Materials Science, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong ; Fu, Ricky K.Y. ; Peng Chen ; Weili Liu
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Silicon carbide films were synthesized by methane plasma immersion ion implantation into silicon and their properties were investigated. The molecular ions dissociate upon entry into the sample surface and our simulation results show that the implanted hydrogen peak is located at about twice as deep as the implanted carbon. The films undergo a transformation from hydrogenated amorphous silicon carbide to β-SiC with increasing annealing temperature. The amount of SiC bonds increases with annealing temperature whereas the CC bonds change in an opposite manner. At high temperature, a large amount of β-SiC forms and graphitization takes place within the remaining carbon clusters. For the sample annealed at 1300 °C, SiC bonds are detected by Raman spectroscopy, and our data indicate that β-SiC grains may contribute to the strong photoluminescence behavior. © 2003 American Vacuum Society.

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Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures  (Volume:21 ,  Issue: 4 )