Accelerated Testing of Class a CMOS Integrated Circuits

The need for a practical accelerated test for Class A CMOS integrated circuits is recognized. The present 250°C/250-hour test condition is neither applicable nor practical as a group B lot acceptance test. The previously reported activation energy was basically confirmed between 200°C and 250°C on the tested CMOS device types (1.0 - 1.4 MeV). The validity of extrapolations down to operating temperatures based on accelerated tests must be experimentally confirmed. Therefore, continued long-term testing at 125°C is necessary.