What do GaN FETs look like and how do they work?
eGaN transistors are very similar to lateral FETs (Field Effect Transistors) made in silicon. Please refer to the application note Fundamentals of Gallium Nitride Power Transistors for a general discussion of the devices and technology.
The following videos also cover the basics of GaN:
How To GaN 01: Introduction – Material Compositions
How to GaN 03 – Performance Characteristics
EPC’s GaN Power Transistor Structure
Scanning electron micrograph cross section of an eGaN FET