Patent ID: 11971057
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Surface technology, coating (Chemistry)
Classification: CPC F  C  H | IPC C  F  H

Claim 8:
9. A method for transporting a gas, comprising:
flowing, through an exhaust conduit, an exhaust gas from a gas containing chamber for processing a substrate;
flowing a purge gas into one of a plurality of gas inlet ports of an exhaust conduit joint;
flowing the purge gas through a spiral vent in an exhaust conduit liner within the exhaust gas conduit, the spiral vent having a width W1 measured along length of the exhaust conduit liner and the spiral vent in the exhaust conduit liner having a width W2 measured along the length of the exhaust conduit liner at a location downstream of a location where W1 is measured, W2 being larger than W1; and
creating a curtain of purge gas along an internal surface of the exhaust conduit liner.