I studied all this stuff in university during the dark ages, and still have to do a double take whenever I see “nm” measurements. These things are atomic scale, and we use them all day long as if nothing happened.
Yeah I can remember how amazing 1 micron widths were. getting to 100th of that is a miracle.
Slightly off topic but, how do they create the lithography masks with such tiny and precise features?
Cut with lasers or electron beams as far as I know, and the masks are bigger by some multiple. Also have really weird patterns, since they have to correct for how the light-waves interact due to the small size.