Patent ID: 7638106
Filing Date: 2009-12-29
Classification: B01D,C23C

Abstract:
1. A method of treating an exhaust gas stream from a process chamber to which a first precursor gas and a second precursor gas are alternately supplied, the method comprising: conveying the gas stream to a gas mixing chamber; heating a reactant prior to supplying the reactant to the gas mixing chamber; supplying the reactant to the gas mixing chamber; reacting the reactant with one of the first precursor gas or the second precursor gas to form solid material; conveying the gas stream to a separator; and separating the solid material from the gas stream; wherein the gas mixing chamber is upstream of a vacuum pump used to draw the gas stream from the process chamber and wherein the reactant is the same as the second precursor gas and the reactant reacts with the first precursor gas.