A MATHEMATICAL MODEL OF THE SILICON CHEMICAL VAPOR DEPOSITION IN A ATMOSPHERIC PRESSURE COLD-WALL REACTORReport as inadecuate




A MATHEMATICAL MODEL OF THE SILICON CHEMICAL VAPOR DEPOSITION IN A ATMOSPHERIC PRESSURE COLD-WALL REACTOR - Download this document for free, or read online. Document in PDF available to download.



Abstract : The deposition of polycrystalline and amorphous silicon from SiH4-H2 and SiH4-CH4- H2 system has been studied. Deposition temperature between 600 and 850°C have been used in a atmospheric pressure reactor. It is found that the deposition rate of silicon in SiH4-CH4-H2 system is reduced by about half SiH4-H2 system. Therefore, to investigate the effect of CH4 in silicon deposition we describe numerical models of the gas-phase hydrodynamics and chemical kinetics. The chemical kinetic model, which includes a 16-step elementary reaction mechanism in SiH4-H2 system and a 32-step in SiH4-CH4-H2 system for the thermal decomposition of silane, predicts chemical species concentration profiles and fluid dynamical simulation predicts gas-phase temperature and velocity profiles. The chemical kinetic calculations indicate significant differences in the levels of silicon species for SiH4-H2 system versus SiH4-CH4-H2 system and decomposition of SiH2 is important in describing silicon chemical vapor deposition.





Author: Y. Park G. Min C. Park J. Chun

Source: https://hal.archives-ouvertes.fr/



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