IMPROVING OF LARGE-AREA GTO HOMOGENEITY BY ELECTRON-IRRADIATION

For a reliable function of high-power GTOs it is important that individual parallel-connected segments of a GTO structure are nearly of the same characteristics, both static and dynamic. The presented paper deals with the study of electron irradiation influencing the carrier lifetime and decreasing the relative dispersion of the carrier lifetime on the area of power GTO. Theoretical presumptions were experimentally verified by measuring of current gain distribution in large-area GTOs before and after different electron irradiation doses.