Article: Vacuum furnaces designed for advanced CVD system; chemical vapor deposition systems require either hot wall furnaces or cold wall, vacuum-type furnaces.

Vacuum Furnaces Designed for Advanced CVD Systems

Chemical vapor deposition is based on the chemical reaction between a gaseous phase and the heated surface of a substrate. Most CVD processes are carried out in open loop systems. Reactant gases are continuously supplied to the system, while the reaction gases are continually removed. A "hot" process, it is carried out generally in temperatures ranging from 500 [degrees] C to 1100 [degrees] C.

CVD systems are used to form very thin layers, usually no more than several thousandths of an inch thick. The deposits attach themselves to the substrates. The substrate surface acts as a catalyst upon which the coating ...

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