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

Claim 0:
1. A method, comprising:
directing one or more first jets of air, entering into a chamber of a wafer table, to impinge onto walls and one or more components in the chamber to extract one or more particles from surfaces of the walls and the one or more components;
directing the entered air and the extracted one or more particles as a first stream of air to an air filter system outside the chamber of the wafer table to clean the first stream of air;
recycling the cleaned first stream of air into the chamber of the wafer table when a number of particles in the first stream of air is below a first threshold and an amount of organic material in the first stream of air is below a second threshold; and
ending the first stream of air when the number of particles in the first stream of air continuously stays below the first threshold for a predetermined amount of time and the amount of organic material in the first stream of air continuously stays below the second threshold for the predetermined amount of time.