Patent ID: 6431183
Filing Date: 2002-08-13
Classification: C01B,C02F,H01L,Y10S

Abstract:
A method of treating semiconductor substrates which comprises the steps of:generating ozone; dissolving said ozone in water for treatment of semiconductor substrates; dosing with ultraviolet light said water in which said ozone has been dissolved, said dosing step adjusting the concentration of ozone dissolved in said water by reducing the concentration; and treating semiconductor substrates with said water containing said ozone in said adjusted concentration or a chemical solution comprising said water containing said ozone in said adjusted concentration, wherein said water containing said ozone in said adjusted concentration or said chemical solution comprising said water containing said ozone in said adjusted concentration is prepared before treating said semiconductor substrates therewith, and wherein said dosing step adjusting the concentration of ozone dissolved in said water by changing the concentration periodically when the concentration of ozone dissolved in said water changes in the opposite direction of the concentration of said chemical solution.