Patent ID: 9617637
Date: 2017-04-11
CPC Classifications: C23C,H01J,H01L

Claim:
1. A method for delivering liquid precursor in a substrate processing system, comprising: supplying liquid precursor using a first valve in fluid communication with a liquid precursor source; supplying purge gas using a second valve in fluid communication with a purge gas source; arranging a third valve having a first input port and a second input port independent of the first input port, wherein the first input port is in fluid communication with an output port of the first valve and the second input port is in fluid communication with an output port of the second valve, and wherein the third valve is arranged to selectively supply either one of (i) liquid precursor received via the first valve through the first input port or (ii) purge gas received via the second valve through the second input port; arranging an input port of a first divert injector valve in fluid communication with an output port of the third valve; and operating the first valve, the second valve, the third valve and the first divert injector valve in first, second, third and fourth modes, when there is no request for liquid precursor, configuring in the first mode and closing the first valve, opening the second valve to supply the purge gas to the second input port of the third valve, supplying the purge gas with the third valve and opening the first divert injector valve, in response to a request for liquid precursor, configuring sequentially in the second mode, the third mode and the fourth mode,