Patent ID: 6799888
Filing Date: 2004-10-05
Classification: G01K

Abstract:
A method for predicting, using a test wafer, a temperature of a wafer to be loaded into a lamp heating system including a lamp, the method comprising the steps of:a) preparing the test wafer, which includes a first semiconductor layer formed in a crystalline state, a second semiconductor layer formed in an amorphous state on the first semiconductor layer, and a light absorption film formed over the second semiconductor layer; b) loading the test wafer into the lamp heating system and then irradiating the test wafer with a light emitted from the lamp, thereby heating the second semiconductor layer through the light absorption film; c) calculating a recovery rate of the second semiconductor layer from the amorphous state to the crystalline state at which a part of the second semiconductor layer that has been heated recovers from the amorphous state to the crystalline state at the interface with the first semiconductor layer; and d) measuring a temperature of the test wafer that has been irradiated with the light, according to a relationship between the recovery rate and a temperature corresponding to the recovery rate.