Patent ID: 6653856
Filing Date: 2003-11-25
Classification: G01R

Abstract:
A method of determining reliability of semiconductor products, the method comprising:providing a semiconductor wafer, and a plurality of metal-oxide-semiconductor (MOS) transistors being formed on a surface of the semiconductor wafer; placing the semiconductor wafer in an environment of a stress temperature during a testing time period, and simultaneously stressing the MOS transistor with a stress voltage; defining a plurality of testing points in the testing time, and measuring a threshold voltage shift of the MOS transistor at each testing point so as to establish a group of experimental data; providing a relationship model of threshold voltage shift (&Dgr;Vth) vs. time (t); and using the group of experimental data and the relationship model to depict a relation curve for predicting the threshold voltage shift of the MOS transistor when exceeding the testing time.