Effects of hot-carrier trapping in n- and p-channel MOSFET´s

Detailed measurements of hot-carrier gate current and its trapping effects were studied on both n- and p-channel MOSFET´s down to submicrometer channel lengths. Comparison of the measurements for these two types of devices is made. No hot-hole gate current or hot-hole trapping was detected in p-channel MOSFET´s. A hot-electron gate current is present not only in n-channel MOSFET´s, but also in p-channel MOSFET´s where the current is increased by hot-electron trapping. By trapping hot electrons uniformly over the channel in n-MOSFET´s, it was shown that hot-electron trapping produces only negative oxide charge without generating interface traps.