Recently the US govt has banned China firms from acquiring the machines for 14nm process technology and below. This legislation specifically targets China firms. However, what stopping non-China firms from working with China firms? Also, for example TSMC has the EUV machines from ASML to produce 7nm and 5nm and potentially 3nm process. But TSMC reportedly has plants in Shanghai, China. Is there any law that specifies they cannot bring those EUV machines made by ASML to mainland China? Whether be it under their own control or leased to another party (the latter beinng a loophole in the law) Sure, its a Taiwanese owned company with plants in mainland China and they have no obligation to deploy those high end manufacturing there, but for a legal perspective, is there anything to say they can't operate such equipment on the mainland?
So what does the law entails? It it a broadly worded just to restrict China Chinese companies from getting hold of advance lithography tech or does it go further in details?
Also if ASML's EUV machines are in Taiwan and if US recognizes one-China policy, then having it in Taiwan wouldn't hold up in a court of law?