Semiconductors

DfM Metrics 211

5.4.3 FMEA-RoI Correlation

The RoI of design rules depends on the failure modes the rules would prevent.

Adding a design rule to ensure manufacturability may improve yield, yet the

time to money may be longer than the time allocated for the new product devel-

opment. Three scenarios may affect the time-dependent cost of rule imple-

mentation for high-, medium-, and low-severity failure modes (Figure5.7):

• Scenario 1: (high severity) The new rule is required to ramp volume

production (Figure5.7a). (Standard, mandatory design rule)

• Scenario 2: (medium severity) The new rule helps develop the new

product faster (Figure5.7b). ...