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

Claim 0:
1. A system for deep ultraviolet (DUV) optical lithography, the system comprising:
an optical source apparatus comprising N optical oscillators, wherein N is an integer number greater than or equal to two, and each of the N optical oscillators is configured to produce a pulse of light in response to an excitation signal; and
a control system coupled to the optical source apparatus, the control system configured to determine a corrected excitation signal for a first one of the N optical oscillators based on an input signal and an efficiency transfer function, the input signal comprising an energy property of a pulse of light produced by a second one of the N optical oscillators and the efficiency transfer function being associated with the second one of the N optical oscillators, wherein the efficiency transfer function relates excitation of the second one of the N optical oscillators with optical output of the second one of the N optical oscillators.