@article{5950, author = {G. J. Nienhuis and W. Goedheer}, title = {Modelling of a large scale reactor for plasma deposition of silicon}, abstract = {A 2D fluid model for RF discharges in a mixture of silane and hydrogen is applied to a cylindrically symmetric reactor with an electrode radius large compared to the electrode separation. In the model the electron kinetics are included by solving the two-term Boltzmann equation to obtain the electron energy distribution function. The chemistry is taken from the literature and only diffusive transport of the neutral species is considered. The plasma-wall interaction (including the deposition) is modelled by using surface reaction coefficients. As a result of the large depletion of silane, the uniformity of the deposition strongly depends on the type of gas inlet. Both a showerhead gas inlet system, where the powered electrode is perforated, and gas inlet through a ring shaped area around one of the electrodes are considered. As can be expected, both the discharge and the deposition are homogeneous in case of a shower inlet. The ring inlet leads to an almost pure hydrogen plasma in the centre, while at the edge of the electrodes a mixture of silane and hydrogen is present. As compared to a small scale reactor with a low depletion, the growth precursor shifts from SiH3 and higher silane radicals to SiH2.}, year = {1999}, journal = {Plasma Sources Science & Technology}, volume = {8}, number = {2}, pages = {295-298}, month = {May}, isbn = {0963-0252}, doi = {10.1088/0963-0252/8/2/310}, language = {eng}, }