626 karma · joined February 13, 2014
Also: Even while ASML steppers are built in Netherlands, there are a lot of other non-photolithography tools needed to build a fab in addition to the ASML tools.
In reality, much more than 1 electron is required to store a 0 or 1 with any level of reliability. On the order of 10s to 100s of electrons per bit even on leading processes.
Channel ECC is the ECC type most directly relevant for high clock rates and signal integrity aspects. I agree with you that Channel ECC becomes a practical requirement to meet the interface transaction rates of DDR5. It is also true that channel ECC is not mandatory in DDR5 and is not implemented by mainstream CPU platforms (like previous DDR generations).
That might be typically true, but it is not always true! The product line I work for produces the same IC simultaneously in both 200mm and 300mm fabs. Same mask set, identical device, no redesign. And we are moving more of our existing products into 300mm fab without redesign at all. Process is 65nm.