Single-event upset in commercial silicon-on-insulator PowerPC microprocessors

Single-event upset effects from heavy ions and protons are measured for Motorola and IBM silicon-on-insulator (SOT) microprocessors, and compared with results for similar devices with bulk substrates. The cross sections of the SOI processors are lower than their bulk counterparts, but the threshold is about the same, even though the charge collection depth is more than an order of magnitude smaller in the SOI devices.