Most integrated circuits are fabricated in a complementary metal oxide semiconductor (CMOS) technology, which features two types of transistors, an nMOS and a pMOS transistor. As the MOS transistor is the basic element of 90% of all integrated circuits, we will repeat some of the material in Part I, because of its importance. Basically, a MOS transistor has three terminals: a gate, a source and a drain (Fig. 5.1). The gate is separated from the channel region by only an extremely thin (tox) insulating gate oxide.
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