The New Generation of SOI MOSFETs

The classical MOSFET is reaching its scaling limits and “endof-roadmap” alternative devices are being investigated. Amongst the different types of SOI devices proposed, one clearly stands out: the multigate fieldeffect transistor (multigate FET). This device has a general “wire-like” shape. Multigate FETs are commonly referred to as “multi(ple)-gate transistors”, “FinFETs”, “tri(ple)-gate transistors”, “GAA transistors”, etc. This Paper describes the reasons for evolving from single-gate to multi-gate structures. It also describes some issues in ultra-small devices, such as doping fluctuation effects and quantum confinement effect.