Patent ID: 11953839
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 8:
9. A method, comprising:
directing a first stream of gas, comprising a solvent, to enter into a chamber of a lithography system to impinge on walls and surfaces of one or more components in the chamber of the lithography system to extract one or more particles from the walls and the surfaces of the one or components and to dissolve organic material contamination, by the solvent, from the walls and the surfaces of the one or components;
directing the entered first stream of gas that comprises the extracted one or more particles and the dissolved organic material contamination, as a second stream of gas, to a gas filter system outside the chamber of the lithography system to clean the second stream of gas;
recycling the cleaned second stream of gas into the chamber when a number of particles in the cleaned second stream of gas is below a first threshold and an amount of organic material in the cleaned second stream of gas is below a second threshold; and
ending the cleaned second stream of gas when the number of particles in the cleaned second stream of gas continuously stays below the first threshold for a predetermined amount of time and the amount of organic material in the cleaned second stream of gas continuously stays below the second threshold for the predetermined amount of time.