Abstract
Precursors for Silicon nitride films prepared by mixing SiH2Cl2 with NH3 were investigated by in situ Fourier-transform infrared spectroscopy (FT-IR) and mass spectrometry. The FT-IR spectral analysis results indicated that the Cl was removed from SiH2Cl2 by mixing SiH2Cl2 with NH3 at room temperature (R.T.). The analysis results also indicated the existence of radicals which had the chemical bond Si–N. The mass spectral analysis results indicated the existence of the radicals with the mass number of 45–47. From these results, it was concluded that the precursors of SiNHx for SiN films were formed by mixing SiH2Cl2 with NH3.
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