> After all, the TSMC logo features failing parts! I'm not sure about that, I th... | Hacker News

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		nutjob2 47 days ago \| parent \| context \| favorite \| on: TSMC Arizona outage saw fab halt, Apple wafers scr... > After all, the TSMC logo features failing parts! I'm not sure about that, I think the blank spaces are just parts that have been picked. The dies have been cut and the good ones are being removed.

prezk 47 days ago [–]

Normally a wafer would have die-sized spaces for test structures used for optical, electrical, chemical and other tests. Think the TV test card https://en.wikipedia.org/wiki/Test_card

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