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Home > FAQ > Epitaxy > Q:In the test report of blue LED wafers,it shows Vf and IV (mcd). How is this mcd being measured without actually processing the wafer into devices?

Q:In the test report of blue LED wafers,it shows Vf and IV (mcd). How is this mcd being measured without actually processing the wafer into devices?   

 

A:We use prober equipment and contact positive and negative pole, connect current, and then get the voltage and IV.