The World of Next-Gen Transistors: Meet Circular-Gate NACTs

As technology moves forward, traditional electronics face limits. For instance, Boltzmann's law and short-channel effects pose issues for metal-oxide-semiconductor field-effect transistors (MOSFETs). But there's a new kid on the block: nanoscale air channel transistors (NACTs), which use a vacuum-like channel and something called Fowler-Nordheim tunneling. Recent studies have introduced a novel Circular Gate NACT (CG-NACT). These transistors are built on a 4-inch silicon wafer using a process that's compatible with what's already in use. The special thing about these CG-NACTs is their super low subthreshold swing (SS), reaching just 0. 15mV/decade. Even after three decades of drain current, the average SS stays low at around 1. 5mV/decade.

That's not all. These CG-NACTs can handle a lot of drain current - up to milliamperes - even with a low drain voltage of 0. 7V. They also have an impressive on/off ratio of 7. 82 million. One of the coolest things is that these transistors can take the heat, remaining stable even at temperatures up to 150°C and under irradiation. But how do they work in real-world applications? Well, researchers designed an inverter circuit using these CG-NACTs for the very first time.

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