In this paper a linear control scheme for a close-spaced vapor transport pr
ocess to obtain thin film semiconductors is presented. This linear control
scheme is composed of two linear control laws. The inner controller is an i
mplicit control law whose aim is to transform the system into a linear time
-invariant system without disturbances. The outer controller is a classical
PI control law, whose aim is to make the error tend towards zero. (C) 2000
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