Comment by petcat

> EU also restricts ASML EUV machines to China

It's actually the US that restricts ASML from selling EUV machines to China. The EUV light source itself is American technology developed and produced by Cymer in California. ASML was only permitted to acquire Cymer in 2014 under a strict technology sharing and export control agreement with the US government.

It's why, for instance, ASML's next generation research lithography machine is currently being installed in upstate New York and not somewhere in the Netherlands.