Patent ID: 8634080

Claim:
A method of determining an active dopant concentration profile of a semiconductor substrate based on optical measurements, the active dopant concentration profile comprising a concentration level and a junction depth, the method comprising: obtaining a photomodulated optical reflectance (PMOR) amplitude offset curve and a PMOR phase offset curve for the semiconductor substrate based on photomodulated reflectance PMOR measurements; determining a decay length parameter based on a first derivative of the amplitude offset curve with respect to the lateral distance between the locations of the pump and probe beams on the surface of the semiconductor substrate; determining a wavelength parameter based on a first derivative of the phase offset curve with respect to the lateral distance between the locations of the pump and probe beams on the surface of the semiconductor substrate; and determining with a computer, from the decay length parameter and from the wavelength parameter, the concentration level and the junction depth of the active dopant concentration profile.