“…In 1979 and 1980, there were some more publications [6]- [13] related to the invention of IGBT with different design concepts. Generally, there are few main categories of discrete IGBTs [14], some examples of which are DMOS IGBT [15][16], trench IGBT [17]- [20], soft punch through IGBT [21], injection enhanced insulated gate bipolar transistor [22], [23], carrier stored gate bipolar transistor [24], high-conductivity IGBT [25] and super junction bipolar transistor [26] [27]. In contrast to discrete IGBTs, the integrated IGBT has complementary metal-oxide-semiconductor (CMOS) compatibility and hence is the…”