Patent ID: 11947268
Assignee: CYMER, LLC
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 8:
9. A method for a deep ultraviolet (DUV) optical lithography system, the method comprising:
determining an energy error based on an amount of energy in a pulse of light emitted from a first one of N optical oscillators and received by a scanner apparatus, wherein N is an integer number that is equal to or greater than two, and the energy error is a difference between the amount of energy in the pulse of light and a target energy;
receiving an initial input signal, the initial input signal being based on the energy error;
determining a corrected input signal based on the initial input signal and an efficiency transfer function of the first one of the N optical oscillators; and
applying the corrected input signal to an excitation mechanism of a second one of the N optical oscillators.