Yield
Beginner
The share of chips from the factory that work. If 90 out of 100 work, the yield is 90%.
Novice
The fraction of manufactured chips that come out free of defects that stop them working. Bigger chips have lower yield, because each one is more likely to contain a defect; yield rises as a factory process matures.
Expert
Sets cost per good die and, together with fault coverage, the defect level of shipped parts. New processes and designs start low and climb through yield learning, which draws on inline inspection, test structures and volume diagnosis of failing chips.