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Its not economies of scale. Why or how would you even etch a worse pattern on the same fabrication node? They don’t even have a mask for the worse version its literally just the same pattern with more defects.

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They only make one design because of economies of scale. I think there might have been some confusion here

Maybe you can get more of them per wafer because they're smaller?

Yes but that’s a different thing those smaller chips also get binned based on defects

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