Patent ID: 11949202
Assignee: CYMER, LLC
Field: Chemical engineering (Chemistry)
Classification: CPC H  B  Y | IPC B  H

Claim 0:
1. A gas recycle system comprising:
a gas purifier system configured to receive an exhaust gas mixture from an excimer laser, the exhaust gas mixture comprising intended gas components and impurity gas components, the gas purifier system being configured to reduce an amount of at least one of the impurity gas components to form a purified gas mixture based on the exhausted gas mixture;
a gas analysis system comprising a measurement system configured to receive at least a portion of the purified gas mixture and to measure an amount of at least one intended gas component in the purified gas mixture and an amount of at least one impurity gas component in the purified gas mixture;
a gas blending system that prepares a recycled gas mixture based on the purified gas mixture; and
a control system coupled to the gas analysis system and the gas blending system, the control system configured to:
determine whether the measured amount of the at least one intended gas component is within a first range of acceptable values;
determine whether the measured amount of the at least one impurity gas component is within a second range of acceptable values;
if the measured amount of the at least one intended gas component is not within the first range of acceptable values, cause the gas blending system to add an additional gas component to the purified gas mixture to prepare the recycled gas mixture; and
if the measured amount of the at least one impurity gas component is not within the second range of acceptable values, generating an error signal.