Patent ID: 8480847
Filing Date: 2013-07-09
Classification: H01L

Abstract:
1. A processing system comprising: a processing vessel configured to contain an object to be processed; a processing fluid generating unit configured to generate a processing fluid; a processing-side fluid passage configured for supplying the processing fluid generated in the processing fluid generating unit into the processing vessel; a discharge fluid passage configured for discharging the processing fluid from the processing vessel; a bypass-side fluid passage connected with the discharge fluid passage at its downstream end and connected with the processing-side fluid passage at its upstream end, and configured for discharging the processing fluid generated in the processing fluid generating unit without passing said processing fluid through the processing vessel; a pressure control mechanism provided to the discharge fluid passage downstream from a position at which the downstream end of the bypass-side fluid passage is connected with the discharge fluid passage; a switch valve configured to selectively switch a fluid passage, into which the processing fluid generated in the processing fluid generating unit is fed, between the processing-side fluid passage and the bypass-side fluid passage; a purging gas supply fluid passage configured for supplying a purging gas into the processing vessel, a downstream end of the purging gas supply fluid passage being connected with the processing-side fluid passage downstream from the switch valve; a purging gas discharge fluid passage configured for discharging the purging gas from the processing vessel, an upstream end of the purging gas discharge fluid passage being connected with the discharge fluid passage upstream from the position at which the downstream end of the bypass-side fluid passage is connected with the discharge fluid passage; an on-off valve provided to the purging gas supply fluid passage and configured for controlling a supply of the purging gas; and a discharge switch valve provided at a position at which the purging gas discharge fluid passage is connected to the discharge fluid passage, and configured to make the processing fluid flow in the discharge fluid passage through the discharge switch valve and to make the purging gas flow from the discharge fluid passage into the purging gas discharge fluid passage, wherein the on-off valve, the switch valve, and the discharge switch valve are controlled such that: when the purging gas flows into the processing vessel from the purging gas supply fluid passage through the on-off valve, the processing fluid generated in the processing fluid generating unit is fed into the bypass-side fluid passage through the switch valve and then discharged from the discharge fluid passage after passing through the pressure control mechanism, while the purging gas discharged from the processing vessel is fed into the purging gas discharge fluid passage through the discharge switch valve and then exhausted from the purging gas discharge fluid passage; and when the processing fluid generated in the processing fluid generating unit flows into the processing vessel and the object to be processed is processed, the processing fluid fed into the processing vessel is discharged from the discharge fluid passage after passing through the pressure control mechanism, while the purging gas is prevented from flowing into the processing vessel by the on-off valve; when the purging gas flows into the processing vessel from the purging gas supply fluid passage through the on-off valve, the purging gas discharged from the processing vessel and fed into the purging gas discharge fluid passage through the discharge switch valve is prevented from flowing through the pressure control mechanism.