Deposition of Thick Layers, in a New CVD Reactor

This paper present a new kind of equipment called the annular reactor, which has been designed to treat a great number of substrates with a particularly good uniformity of thickness of deposits on the batch. Furthermore, a small scale pilot plant of this apparatus, called the sector reactor, has been built. It constitutes a very convenient laboratory piece of equipment, particularly useful to perform, at low cost, the unavoidable experimental part of the development of any new application. Theoretical and experimental results obtained with these reactors are presented and compared to those obtained when using tubular reactors. First tests in order to produce cheap thick layers are also reported.