Composition of FET

The FET (field-effect transistor) can be constructed from several semiconductors, silicon being by far the most common. Several FETs are made with conventional bulk semiconductor processing methods, by using the single crystal semiconductor wafer like the active region, or channel.

Between the more not usual body materials are amorphous silicon, polycrystalline silicon or additional amorphous semiconductors in thin-film transistors or organic field effect transistors which are based upon organic semiconductors and frequently apply organic gate insulators and electrodes.