Patent ID: 11946869
Assignee: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 7:
8. The method according to claim 7, wherein the determination of the majority free carrier concentration of each wafer comprises:
determining the majority free carrier concentration of the reference sample;
measuring with the photoluminescence tool the photoluminescence signal of the reference sample for at least one second photon energy comprised between 1.05 eV and 1.15 eV, the photoluminescence signal of the reference sample exhibiting a second intensity peak in a second photon energy range of 1.05 eV to 1.15 eV;
determining, from the photoluminescence signal of the reference sample, a second experimental relationship between the majority free carrier concentration and a second parameter representative of the second intensity peak;
measuring with the photoluminescence tool the photoluminescence signal of each wafer for at least the second photon energy;
determining from the photoluminescence signal of each wafer a specific value of said second parameter; and
determining the majority free carrier concentration of each wafer from the specific value of said second parameter by using said second experimental relationship.