pmfet

pmfet is a term that typically refers to a type of Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) where the channel is formed by a p-type semiconductor material. In a p-channel MOSFET, the source and drain terminals are doped with acceptor impurities, creating p-type regions. The gate is separated from the semiconductor channel by a thin insulating layer, usually silicon dioxide. Applying a positive voltage to the gate attracts majority charge carriers (holes) to the region beneath the gate, forming a conducting p-channel between the source and drain. This allows current to flow. Conversely, a negative gate voltage repels holes, depleting the channel and turning the transistor off. P-channel MOSFETs are often used in complementary symmetry configurations with n-channel MOSFETs, a design known as CMOS (Complementary Metal-Oxide-Semiconductor) technology, which is fundamental to modern integrated circuits due to its low static power consumption. They are characterized by their threshold voltage, which is typically negative, indicating the gate-source voltage required to initiate conduction.