Patent ID: 11927482
Assignee: APPLIED MATERIALS, INC.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 9:
10. A process system, comprising:
a process chamber;
a plate mounted within the process chamber;
an optical emission spectrometer (OES) located outside the process chamber;
a light fixture mounted to the plate, wherein the light fixture includes a light source; wherein:
an optical path is provided between the light source and the OES, and wherein the OES measures an optical intensity of radiation from the light source; and
a computer-readable storage medium configured to receive information from the OES, and when executed by a processor performs an operation, comprising:
comparing the optical intensity of radiation at a first time with the optical intensity of radiation at a second time; and
modifying the OES if the optical intensity of radiation at the first time is different than the optical intensity of radiation at the second time.