Oliver Haeberlen, Fellow Power Semiconductor Devices & Technologies, and  Tim McDonald, Senior Consulting Advisor to the CoolGaN™ Development Program, both at Infineon Technologies
                  
	Introduction
	Silicon semiconductor technology has evolved considerably over the past 50 years, during which time, multiple failure modes affecting device reliability have been discovered, researched, and addressed.
	This has led to the development of models and equations for failure modes like time-de