NODEhaven you may be right on the others fudging their definition of what a 7nm chip is but it should still be better than the leading current product (S9).
Here is the TSMC article that people are talking about (I'm not sure if this is the original one, the same article is on multiple sites).
http://bitcoinglobal.news/chip-giant-tsmc-expects-strong-demand-for-cryptocurrency-mining-to-continue/

The chips that are used for mining are not as complex as what would be used in a phone or for multitasking.  An ASICs chip is single very fast processing, not a lot of swapping with memory and multiple threads.  It may be easier due to the lack of complexity.

BTCRealm