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# 3D versus 2D illustration

## Appears In

                        - On the Road to Tiny Transistors, How Flat is Flat?

The general architecture of a traditional MOSFET vs. a 2D FET. A FET (field-effect transistor) is a device for regulating the flow of charge carriers (such as electrons) across a channel with three terminals: a source, a drain, and a gate. A MOSFET (metal oxide semiconductor field effect transistor) is by far the most widely used type of FET and is a building block of modern electronics, used in commercial electronic devices for more than 50 years. One main difference between the traditional 3D MOSFET and the “emerging technology” of the 2D FET is that the channel in a traditional MOSFET is in a 3D material, while a 2D FET’s channel is a 2D material.

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