Patent ID: 7844171

Claim:
A rapid thermal processing apparatus comprising: a processing chamber subjecting a semiconductor substrate to rapid thermal processing; a substrate support part arranged in the processing chamber and supporting the substrate; a first lamp part optically irradiating and heating a front surface of the substrate supported by the substrate support part; a first radiation light sensor arranged on a back surface side of the substrate and receiving a radiation light from the substrate; a temperature computing part computing a temperature of the substrate based on an output signal of the first radiation light sensor; and a control part controlling an irradiation intensity of the first lamp part according to the temperature of the substrate computed by the temperature computing part, wherein the rapid thermal processing apparatus further comprises a second lamp part optically irradiating and heating the substrate support part, and a second radiation light sensor arranged on a back surface side of the substrate support part and receiving a radiation light from the substrate support part, and wherein the temperature computing part computes a temperature of the substrate support part based on an output signal of the second radiation light sensor, and the control part controls the irradiation intensity of the first lamp part based on the calculated temperature of the substrate, and controls an irradiation intensity of the second lamp part based on the calculated temperature of the substrate support part.