It's probably very hard to shrink further than a very low number of atoms but we're far from that. The "2nm" marketing name has no relation to the actual physic

It's probably very hard to shrink further than a very low number of atoms but we're far from that. The "2nm" marketing name has no relation to the actual physical size of the transistors. The physical features of the "3nm" process node are something like 24nm and 48nm. The Van der Waals radius of a silicon atom is about 0.2nm. Transistors made from a single molecule have been demostrated. Maybe we could even shrink to elementary particles but that's in the realm of SciFi so far.