Dr. Alex Lidow joined International Rectifier as an R&D engineer and is the co-inventor of the HEXFET power MOSFET, a power transistor that displaced the bipolar transistor and launched modern power conversion. Over the 30 years Dr. Lidow was at IRF, his responsibilities grew from engineer to head of R&D, head of manufacturing, head of sales and marketing, and finally CEO for 12 years.