https://www.cnet.com/news/iphone-xs-a12-bionic-chip-is-industry-first-7nm-cpu/

The A12 processor inside Apple's iPhone XS and XS Max phones are the first to use a new, more advanced chip manufacturing technology that miniaturizes circuitry, Apple said Wednesday.

The chips are the first to use a 7-nanometer manufacturing process, marketing chief Phil Schiller at Apple's iPhone launch event. A nanometer is a billionth of a meter, and smaller sizes mean more transistors can fit onto a single chip.