The kinetic growth model for hydrogenated amorphous silicon (a-Si:H) from S
iH4 radicals in SiH4 plasmas is reviewed on the basis of recently obtained
experimental and computational data. New surface reactions are considered a
nd their implications for the a-Si:H film growth mechanism are discussed. F
urthermore, from the experimentally observed substrate temperature-dependen
ce of the bulk hydrogen content and the composition of the a-Si:H surface h
ydrides, it is concluded that surface processes play an important role in h
ydrogen elimination from the him during growth. (C) 2001 Elsevier Science B
.V. All rights reserved.