Patent ID: 7207340

Claim:
A gas removal system, that removes a halogen gas remaining inside a processing chamber after executing processing inside said processing chamber in an airtight state and obtaining plasma through discharge dissociation of a process gas, which contains the halogen gas supplied from a process gas supply system, comprising: a pressure control device that controls the pressure inside said processing chamber; an air supply device that supplies atmospheric air into said processing chamber after lowering the pressure inside said processing chamber with said pressure control device, wherein lowering pressure inside said processing chamber prevents diffusion of the halogen gas to an atmosphere outside said processing chamber, wherein said air supply device comprises an atmosphere opening device that opens said processing chamber to an atmosphere outside of the processing chamber, wherein said atmosphere opening device comprises a rotating mechanism for rotating said process gas supply system; a control device that controls said air supply device; an evacuation device that evacuates a gas produced through a reaction of the halogen gas and the atmospheric air having occurred in said processing chamber; and a sensor that detects an extent to which said processing chamber is opened to the atmosphere by said atmosphere opening device.