کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5364045 | 1388310 | 2007 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Etching of SiC by energetic F2: Molecular dynamics simulation
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Molecular dynamics (MD) simulations were performed to investigate F2 continuously bombarding silicon carbide (SiC) surfaces with energies in the range of 50-200Â eV at normal incidence and room temperature. The Tersoff-Brenner form potential was used. The simulation results show that the uptake of F atoms, the etch yields of C and Si from the initial substrate, and the surface structure profile are sensitive to the incident energy. Like occurrence in Si etching, steady-state etching is observed and an F-containing reaction layer is formed through which Si and C atoms are removed. A carbon-rich surface layer after bombarding by F2 is observed which is in good agreement with experiments. In the reaction layer, SiF in SiF2 species are dominant; with increasing incident energy, the total fraction of SiF and SiF2 increases, while the amount of SiF3 and SiF4 decreases. Finally, etching mechanisms are discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 253, Issue 21, 31 August 2007, Pages 8743-8748
Journal: Applied Surface Science - Volume 253, Issue 21, 31 August 2007, Pages 8743-8748
نویسندگان
F. Gou, M.C. Liang, Z. Chen, Qiu Qian,