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Re:TSMC eyes Germany as possible location for first Europe c... by vijayr02 on Monday July 26, 2021 @08:30AM (#27958580)
Looks like countries are the intuitive units to capture deviations at this level of scale. From NASA's web page about the mirrors in the James Webb telescope [0]:

"That means if the continental United States was polished smooth to the same tolerances, the entire country – from Maine to California – would not vary in thickness by just over two inches!"

Given the US is roughly 27 times the area of Germany, looks like semiconductor manufacturing requires roughly double the accuracy of space telescopes (1 mm * 27 is slightly more than 1 inch)

[0] https://www.nasa.gov/topics/technology/features/webb-craft.h...

Re:TSMC eyes Germany as possible location for first Europe c... by apendleton on Monday July 26, 2021 @03:25PM (#27964140)
Hm, I think the magnitude in the z direction would scale with the magnitude in the x direction or the y direction, rather than with the area (x*y), right?