Patent ID: 11949203
Assignee: CYMER, LLC
Field: Chemical engineering (Chemistry)
Classification: CPC B  H  G  Y | IPC B  G  H

Claim 8:
9. A gas chamber supply system comprising:
a first gas source configured to fluidly connect to a first inlet of a first gas chamber and configured to supply a first gas mixture that contains a first plurality of gases, at least one of the gases in the first plurality includes a halogen;
a second gas source configured to fluidly connect to a second inlet of the first gas chamber and configured to supply a second gas mixture that contains a second plurality of gases, the second plurality of gases lacking a halogen, the second gas source comprising:
a pre-prepared gas supply including the second gas mixture;
a recycled gas supply including the second gas mixture; and
a fluid flow switch connected to the pre-prepared gas supply and to the recycled gas supply; and

a gas recycle system configured to supply the second gas mixture to the recycled gas supply, the gas recycle system comprising:
a gas purifier system configured to receive a gas mixture exhausted from a second gas chamber that is distinct from the first gas chamber;
a gas analysis system that receives the purified gas mixture and analyzes the gas components within the purified gas mixture; and
a gas blending system that prepares a recycled gas mixture and outputs the recycled gas mixture as the second gas mixture of the recycled gas supply; and

a control system connected to the gas recycle system and to the fluid flow switch, and configured to provide a signal to the fluid flow switch to thereby select one of the pre-prepared gas supply and the recycled gas supply as the second gas source.