Re - Intel....19 Jan 2022 13:54
An article on TekDeeps dated April 2021 states that "TSMC is the name that stands out when it comes to chips or semiconductors. The Taiwanese giant is of the largest manufacturers of these components, being responsible for the manufacture of chips that give rise to the most sought after equipment on the market today."
It continues "Apple is TSMC's main customer for 5nm chips, the Apple brand will have practically all units of lithography produced by the Taiwanese, the latest rumours even indicate that Apple have reserved 80% of this production" ( Eighty per cent!! )
So FigTree that would back up your view that TSMC are not the providers for QBT as they pretty much are flat out in looking after Apple, who could probably command sole interest from TSMC with their buying power.
An article more recently ( Sep 2021 ) published in 'How - to - Geek' states:
"TSMC are well ahead in the new generation of 5nm PC processors to be used in 2022 for AMD Ryzen desktops" ( We are talking PC Desktops and not bitcoin mining but relevant ) and goes on to say :
" Intel 5nm processors are coming too, but expected to take a while. The company's desktops processors are expected to come off 14nm and move to 10nm in late 2021 / early 2022. After that a 7nm process is expected in late 2022 / 2023 and then in 2024 there could be an Intel 5nm processor. This timetable could change, but right now that's more or less what Intel watchers are expecting to see."
I accept the last paragraph re Intel is referring to PC processing but overall it appears they are lagging well behind TSMC, this is not necessarily a bad thing and bodes well for QBT if Intel have noted FG's expected delivery to increasing Bitcoin mining speeds exponentially. It would put Intel in to contention almost immediately and a good 18 mths sooner than they are able to achieve inhouse.
That leaves Samsung from your listed 3 Companies capable of 5nm semiconductor manufacturers.
atb.