Patent ID: 6465055
Filing Date: 2002-10-15
Classification: H01L

Abstract:
A film forming method comprising the steps of:(a) preparing an impurity eliminating apparatus, which comprises a mounting stand on which a substrate is substantially horizontally mounted, an ultraviolet lamp for irradiating the substrate mounted on the mounting stand with ultraviolet light having a predetermined wavelength, thereby generating ozone in a space above a surface of the substrate, a casing for housing the ultraviolet lamp, an inert gas supplying mechanism including a gas supply pipe communicating with the casing for supplying an inert gas into the casing through the gas supply pipe, a transmission plate attached to the casing so as to face the substrate mounted on the mounting stand, the transmission plate allowing the ultraviolet light to be transmitted through the transmission plate, exhaust means including a suction and exhaust port that opens in a vicinity of a periphery of the substrate mounted on the mounting stand, and an exhaust pipe communicating with the casing, for exhausting gas from the space between the casing and the substrate through the suction and exhaust port so as to generate a stream of an oxygen-including gas flowing in a direction parallel to the space and for exhausting gas from the casing through the exhaust pipe; (b)(i) generating a stream of the inert-gas flowing from the gas supply pipe toward the exhaust pipe in the casing by exhausting gas from the casing through the exhaust pipe while supplying the inert gas from the inert gas supplying mechanism through the gas supply pipe to the casing, (ii) generating the stream of the oxygen-including gas in the space by exhausting gas from the space through the suction and exhaust port by the exhaust means, and (iii) removing impurities from a surface of the substrate using said impurity eliminating apparatus; and (c) forming a coating film on the substrate by supplying a treatment solution to the substrate after the step (b).