Patent ID: 6577386
Filing Date: 2003-06-10
Classification: H01L

Abstract:
An apparatus for activating a semiconductor impurity by irradiating with a light a semiconductor comprising a major semiconductor element and an impurity element to activate the impurity element, said apparatus comprising:light source means that puts out a light having a wavelength longer than a wavelength causing a band edge absorption of the semiconductor, said wavelength being such that a resonance absorption is caused by a characteristic vibration in a bond of said major semiconductor element and said impurity element; light detecting means that detects a plume caused by an irradiation of said light; and controlling means that controls an intensity of the irradiation of said light according to a detected result of the plume detected by said light detecting means and irradiates the semiconductor with a light having an intensity at which the surface of the semiconductor is not optically processed.