I heard only mobile companies had signed up for that so Samsung and Apple pretty much. Nvidia has yet to sign up for a smaller node hinting that Volta will be on current tech.
That is the 10nm process. Nvidia have officially announced they are supplying 12nm Volta powered Drive PX in Q3.
But ntoe than 12nm is the same planar size as 14/16nm (and thus 20nm). These process names are just marketing terms.