A MOSFET is a type of transistor we can use as a digital switch. The name stands for Metal Oxide Semiconductor Field Effect Transistor. The first MOSFET was made in 1959 by Mohamed M. Atalla & Dawon Kahng. The MOS part describes the gate structure, so the layering is ‘metal’ on top of an thin oxide layer, which lies on top of the (silicon) semiconductor channel. In practice the gate is typically polysilicon and not metal.
