Patent ID: 8469046

Claim:
A method for parallel operation of moisture generating reactors, comprising the steps of: (a) providing a two moisture generating reactors, wherein an orifice is disposed on a mixed-gas inlet side of each moisture generating reactor, and an inlet side of each orifice is connected to a mixed-gas supply line in parallel so that the two moisture generating reactors are connected in parallel, and each orifice of the orifices disposed on the mixed-gas inlet side of the two moisture generating reactors is equal in opening diameter to each other orifice disposed on the mixed-gas inlet side; (b) providing a mixed gas consisting of hydrogen and oxygen, and allowing the mixed gas to branch off through each of the orifices so that the mixed gas is supplied to each moisture generating reactor, wherein the mixed gas is supplied so that mixed gas substantially equal in amount to each other is supplied from the mixed-gas supply line to each of the two moisture generating reactors; (c) supplying moisture generated by each of the two moisture generating reactors along a moisture supply line to a process chamber that uses the moisture, wherein each moisture generating reactor has an end on a moisture gas outlet side, and the ends of the reactors are connected in parallel to each other, and wherein an internal pressure of each moisture generating reactor has a pressure value of 200 Torr or more; (d) operating the process chamber under a pressure of 1 to 760 Torr, wherein the moisture supply line that supplies moisture generated from the moisture generating reactors is provided with a depressurizing orifice; and (e) using the depressurizing orifice to depressurize the moisture supplied to the chamber by the moisture supply line.