How are drain, source and gate named?

The three names of gate, source and drain come from English.

Gate (gate electrode) gate means gate. The Chinese translation is gate, fence. electrode, electrode.

Source (source) source resource, power source, Chinese translation is source. An electrode that collects electricity.

Drain (drain) drain discharge, leakage, Chinese translation is drain. Emitting electrode.

Gate

A mesh-shaped or spiral electrode composed of metal filaments. One or more electrodes with a fine mesh or spiral shape arranged between the anode and the cathode in a multipole electron tube play the role of controlling the electric field intensity on the surface of the cathode to change the electrons emitted by the cathode or capture secondary emitted electrons.

Source

The source is referred to as a field effect transistor. General transistors are composed of two polarity carriers, namely majority carriers and minority carriers of opposite polarity, participating in conduction, so they are called bipolar transistors, while FETs are only composed of majority carriers participating in conduction. , which is the opposite of a bipolar transistor, also known as a unipolar transistor.

Drain

The drain is between two highly doped P regions, sandwiching a layer of low doped N region (the N region is generally made very thin), forming There are two PN junctions. Make an ohmic contact electrode at both ends of the N area, make ohmic electrodes on the two P areas, and connect the two P areas to form a field effect transistor.

Reference materials: Baidu Encyclopedia - Gate Baidu Encyclopedia - Source Baidu Encyclopedia - Drain