Kinetic study of silicon precipitation from SiHCl3

Masahito Sugiura*, Akio Fuwa

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    3 Citations (Scopus)


    Using a hot-wall CVD reactor, silicon precipitation rates in the SiHCl3-Ar and SiHCl3-H2-Ar systems were measured in order to elucidate the reaction kinetics in these systems. Silicon precipitation in the former system takes place through the thermal decomposition reaction of SiHCl3 and its rate is a function of reactant SiHCl3 mole fraction and reaction temperature. That in the latter system takes place through the hydrogen reduction of SiHCl3 in addition to the thermal decomposition reaction and its rate can be expressed as a function of SiHCl3 and H2 mole fractions and temperature. In both systems, the transition temperature from chemical reaction control region to mass transfer control region is around 1173 K. From the observed reactant concentration dependence on these rate expression, a plausible reaction mechanism is proposed where SiCl2(g) and its adsorbed species are the reaction intermediate in the precipitation reaction scheme.

    Original languageEnglish
    Pages (from-to)436-441
    Number of pages6
    JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
    Issue number4
    Publication statusPublished - 1994 Apr

    ASJC Scopus subject areas

    • Metals and Alloys


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