Patent ID: 7789965

Claim:
A method of semiconductor-processing by UV irradiation and cleaning a UV irradiation chamber for semiconductor-processing, the method comprising: processing a semiconductor substrate placed on a susceptor provided in a UV irradiation chamber, by irradiating the substrate with an energy source consisting of UV light through an optical transmitted window provided in the UV irradiation chamber between the UV light and the susceptor while introducing gas through multiple ports from a vicinity of an outer periphery of the optical transmitted window towards a center of the optical transmitted window, wherein the multiple ports are arranged symmetrically to direct said gas in a radial direction towards the optical transmitted window; and after completion of the processing step, introducing cleaning radicals consisting of radicals generated from O 2 gas from only a remote plasma unit outside of the UV irradiation chamber into a space defined between the optical transmitted window and the susceptor, wherein the cleaning radicals are ozonized by said UV light in the space, thereby increasing ozone production, wherein the ozone cleans the optical transmitted window, wherein the cleaning radicals are introduced into the UV irradiation chamber through a side wall of the UV irradiation chamber along a straight line extending from the remote plasma unit into the space of the UV irradiation chamber.