Acoustic consumption monitor
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United States of America Patent
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Nov 19, 2002
Issued Date -
N/A
app pub date -
Sep 23, 1999
filing date -
Jul 29, 1997
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Abstract
A method of determining the reaction efficiency of a CVD process reactor by which a reactive gas combination entering the reactor deposits a solid reaction product as a thin film onto a substrate. The composition of the reactive gas combination is measured by an acoustic cell which is disposed downstream from the outlet port of the reactor to determine the reactor's efficiency. Determination of the reactor's efficiency allows the growth rate of the thin film to be determined as well as associated rates of the products which have been exhausted from the reactor.
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