The processor has only the size of a nail. This achievement was made through a partnership with Samsung and GlobalFoundries.
Such a processor is 40% more efficient than those engraved in 10 nm, the Snapdragon 835 (for example), and especially 75% less energy-consuming.
The technology used is the EUV, the use of extreme ultraviolet, with silicon nanoparticle deposition.
So the smartphones will be faster and with a better autonomy. Processors will also be used in the Internet connected objects.
IBM had already been able to develop more than 20 billion transistors on a chip, all engraved in 7 nm. The processors in 7 nm will be available on the market by 2018. As for those in 5 nm, we will have to wait until 2020.
Source : https://www-03.ibm.com/press/us/en/pressrelease/52531.wss