The insulated gate bipolar transistor, invented by B. Jayant Baliga in the early 1980s, has generated over $15 trillion in global consumer savings. This power semiconductor device serves as the fundamental switch for diverse applications ranging from electric vehicles and smart power grids to medical hardware and common household kitchen appliances.
Early Education and Influences
Born in Chennai, India, in 1948, Bantval Jayant Baliga spent his childhood in the village of Jalahalli near Bangalore. His academic foundation began at the Bishop Cotton Boys' School, where he graduated in 1963. His father, Bantval Vittal Manjunath Baliga, was an early Indian electrical engineer who helped establish the nation's television and electronics sectors. The elder Baliga introduced his son to the technical proceedings of the Institute of Radio Engineers during his high school years. Baliga later earned a B.Tech in electrical engineering from the Indian Institute of Technology Madras in 1969, followed by his MS and PhD degrees from Rensselaer Polytechnic Institute in 1971 and 1974, respectively.
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Baliga spent 15 years as a researcher at the General Electric Research and Development Center in Schenectady, New York. His work in the 1980s resulted in the creation of the insulated gate bipolar transistor, which merged principles from both electrical and electronics engineering. This innovation allowed for the precise digital switching of electric current, significantly improving energy efficiency in large-scale and consumer technologies. Beyond his research, Baliga founded three companies focused on semiconductor technology and holds 120 U.S. patents.
Academic Tenure and Global Recognition
In 1988, Baliga joined the faculty at North Carolina State University, later reaching the rank of Distinguished University Professor in 1997. His research output earned him extensive professional validation, including membership in the National Academy of Engineering in 1993 and the European Academy of Sciences in 2005. He received the National Medal of Technology and Innovation from President Barack Obama in 2011 and the IEEE Medal of Honor in 2014. In 2024, he was named the recipient of the Millennium Technology Prize.
Fast facts
- Born: 28 April 1948, Chennai, India
- Citizenship: United States and India
- Education: IIT Madras, Rensselaer Polytechnic Institute
- Key Invention: Insulated Gate Bipolar Transistor (IGBT)
- U.S. Patents Held: 120
- Inducted into National Inventors Hall of Fame: 2016
- Academic Home: North Carolina State University
Questions readers ask
What is the primary function of the IGBT?
It acts as a high-efficiency transistor switch used to control and distribute energy in devices ranging from solar and wind power systems to consumer appliances and electric cars.
What is the significance of the Millennium Technology Prize for Baliga?
Awarded in 2024, the million Euro prize recognizes his invention of the IGBT, which is considered one of the most vital developments for global energy distribution efficiency.
Achievements
- National Inventors Hall of Fame — 2016
- National Medal of Technology and Innovation — 2010
- Affiliated with North Carolina State University
- Educated at Rensselaer Polytechnic Institute, Indian Institute of Technology Madras and Bishop Cotton Boys' School
- Worked as electrical engineer and scientist
