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by froindt
2877 days ago
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Yes it is. The 99.8% hypothetical number is on a per operation basis. Depending on the layers and complexity of the chip, the ballpark number of operations might be 300-1500 (lots of hand waiving here). The gist of that part is meant to show how important and impressive the entire process is. In "normal" manufacturing, 99.8% good parts is a pretty darn good process. Many of the easy wins are already implemented. Most normal things are manufactured in far fewer steps, so even if you're only making 95% good parts, it doesn't absolutely kill your total recovery (start to finish). |
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