Silicon technology today forms the basis of a world-wide, multi-billion dollar component industry. The reason for this expansion can be found not only in the physical properties of silicon but also in the unique properties of the silicon-silicon dioxide interface. However, silicon devices are still subject to undesired electrical phenomena called "instabilities". These are due mostly to the imperfect nature of the insulators used, to the not-so-perfect silicon-insulator interface and to the generation of defects and ionization phenomena caused by radiation. The problem of instabiliti.