Question

what is nanometre technology used in mobile chips

Answer 1

The 14 nanometer (14 nm) semiconductor device fabrication node is the technology node following the 22 nm/(20 nm) node. The naming of this technology node as "14 nm" came from the International Technology Roadmap for Semiconductors (ITRS). One nanometer (nm) is one billionth of a meter. The smallest commercial chips now use 10nm technology.

The first 14 nm scale devices were shipped to consumers by Intel in 2014.