Patent ID: 9541452
Date: 2017-01-10
CPC Classifications: G01J,G01N,H01J,H01L

Claim:
1. A formation method of forming a calibration curve, characterized by comprising: ion-implanting different doses of an impurity into a plurality of first samples made of the same semiconductor; measuring by a photoluminescence spectroscopy, for each of the plurality of first sample into which the impurity is ion-implanted, an intensity of photoluminescence deriving from the impurity, and obtaining a relationship between the dose of the implanted impurity and the intensity of the photoluminescence; measuring by the photoluminescence spectroscopy, for a second sample made of the same semiconductor as that of the plurality of first samples, an intensity of photoluminescence deriving from the impurity contained in the second sample, the measurement being performed under the same conditions as those for the measurement by the photoluminescence spectroscopy of the intensity of the photoluminescence for each of the plurality of first samples; and forming, based on the relationship, the intensity of the photoluminescence obtained for the second sample, and a concentration of the impurity contained in the second sample, which is measured by a method other than the photoluminescence spectroscopy, a calibration curve representing a relationship between the concentration of the impurity and the intensity of the photoluminescence deriving from the impurity.