Patent ID: 9698037
Date: 2017-07-04
CPC Classifications: H01L

Claim:
1. A substrate processing apparatus, comprising: a process chamber configured to process a substrate; a holder configured to hold the substrate and carry the substrate into the process chamber; a waiting station located outside the process chamber in which the holder waits prior to carrying the substrate into the process chamber; a circulation path having at least one suction duct formed at one side of the waiting station to suck an atmosphere of the waiting station therethrough and communication ducts directly connected to the at least one suction duct at a downstream side of the at least one suction duct, and configured to recirculate a gas throughout the waiting station; a collection duct connected to the communication ducts; a circulation fan installed at an outlet of each of the communication ducts and configured to establish air flow from the communication ducts to the collection duct; and an exhaust duct connected to the collection duct at a downstream side of the circulation fan, wherein the collection duct has multiple inlets and outlets, and wherein one of the communication ducts is connected to one of the inlets and at least one of the outlets is connected to the exhaust duct, to switch a flow of the gas collected through the communication ducts into either one of the circulation path or the exhaust duct.