Patent ID: 8764905

Claim:
A method of cleaning a lithography optic component, comprising: producing H 2 O 2 vapor from a solution comprising 1% to 30% of H 2 O 2 in water: supplying said H 2 O 2 vapor into a chamber under vacuum containing a lithography optic component, said lithography optic component including a surface having a residue deposited thereon, said residue including organic compounds and graphitic carbon; exposing said H 2 O 2 vapor to electromagnetic radiation having a wavelength within a range of 100 nm to 350 nm to form hydroxyl radicals; oxidizing said residue with said hydroxyl radicals to form volatile organic compounds; and removing said volatile organic compounds from said lithography optic component; wherein said chamber is at a chamber temperature greater than or equal to 100° C.