Patent ID: 7964017

Claim:
A gas flow system for controlling the moisture in a gas flow, the system comprising: a gas source from which gas flows; a processing chamber to which the gas flows; a gas flow line through which the gas flows from the gas source to the processing chamber, the gas flow line including a moisture control line section, the moisture control line section including: a primary pass-through line; a secondary pass-through line, the primary pass-through line disposed such that flow of the gas through the primary pass-through line is in parallel to flow through the secondary pass-through line, and such that the gas flows through either the primary pass-through line or the secondary pass-through line, and the drying characteristics of the secondary pass-through line being different than the drying characteristics of the primary pass-through line; a dryer, the dryer disposed in the secondary pass-through line, the dryer effecting the drying characteristics of the secondary pass-through line being different than the drying characteristics of the primary pass-through line; and dryer valves, the dryer valves including: a first valve, the first valve selectably controlling the gas flow to pass into either the primary pass-through line or the secondary pass-through line such that the gas is controlled to flow through either the a primary pass-through line or the secondary pass-through line; and a second valve, the second valve selectably controlling the gas flow to exit from either the primary pass-through line or the secondary pass-through line; a scrubber disposed in the gas flow line outside of the moisture control line section, the scrubber removing contaminates from the gas in the gas flow; and a moisture sensor disposed in the gas flow, the moisture sensor sensing at least one parameter of the gas and outputting a signal representing the at least parameter to a moisture sensor controller such that the moisture sensor controller determines the moisture in the gas, the moisture sensor controller selectably controlling, based on the moisture, flow of the gas through either the primary pass-through line or the secondary pass-through line, the moisture sensor controller so controlling the moisture in the gas by adjusting the dryer valves.