Image Number 2 for United States Patent #6414279.
A heat treatment device of the light irradiation type with a long service life, in which effective, adequate cooling of the lamps (10) prevents devitrification of the lamp emission portion, even if the power supplied to the lamps is increased to accelerate the temperature increase of the wafer, is achieved by the provision of air injection lines (14) in a mirror (11), in which the lamps are mounted, for blowing in air into the vicinity of the lamps (10), and at least one air exhaust line (23) for evacuation of air from the vicinity of the lamps (10).
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