Structural characterization of amorphous SiCxNy chemical vapor deposited coatings

被引:94
作者
Bendeddouche, A
Berjoan, R
Beche, E
MerleMejean, T
Schamm, S
Serin, V
Taillades, G
Pradel, A
Hillel, R
机构
[1] CNRS, IMP, F-66120 FONT ROMEU, FRANCE
[2] LERMPS, IPSE, F-90010 BELFORT, FRANCE
[3] LMCTS, F-87060 LIMOGES, FRANCE
[4] CNRS, LOE, CEMES, F-31055 TOULOUSE, FRANCE
[5] UNIV MONTPELLIER 2, LPMC, F-34095 MONTPELLIER 5, FRANCE
关键词
D O I
10.1063/1.364396
中图分类号
O59 [应用物理学];
学科分类号
摘要
Chemical bonding and local order around the different atoms of thick amorphous SiCxNy deposits [0.03 less than or equal to x/(x+y) less than or equal to 0.67] prepared with chemical vapor deposition at 1000-1200 degrees C using TMS-NH3-H-2 have been investigated using x-ray photoelectron spectroscopy (XPS), Raman spectrometry, Fourier transform infrared spectrometry (FT-IR), electron energy loss spectroscopy (EELS) and Si-29 magic-angle spinning nuclear magnetic resonance spectrometry (MAS-NMR). XPS analyses have shown that the main bonds are Si-C, Si-N and C-C, and have suggested the existence of C-N bonds. According to Raman analyses and complementary FT-IR absorption of thin films, the coatings are nonhydrogenated. Si, C and N atomic chemical environments are more complicated than in a mixture of pure Si3N4-SiC phases. The examination of the Si KL2,3L2,3 line shapes recorded by XPS have allowed one to state the existence of Si(C4-nNn) units. Mixed coordination shells around silicon have been confirmed by EELS analyses; Additionally, FT-IR reflection analyses have proved that Si is both bonded with N and C. Indirect indication has been obtained owing to the Si-29 MAS-NMR analyses of powders. Raman analyses have been conclusive to assume that C-C bonds correspond to a mixed sp(3)-sp(2) carbon configuration linked with Si(C4-nNn) tetrahedra with 0 less than or equal to n less than or equal to 4. (C) 1997 American Institute of Physics.
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页码:6147 / 6154
页数:8
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