A theoretical description of chloride vapour-phase epitaxy (CVPE) has
been proposed which contains two-dimensional (2D) gas-dynamic equation
s for transport of reactive components and kinetic equations for surfa
ce growth processes connected by nonlinear adiabatic boundary conditio
ns. No one of these stages is supposed to be the limiting one. Calcula
ted variations of growth rate and impurity concentrations along the gr
owing layer fit experimental data well.