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Bantval Jayant Baliga

Insulated Gate Bipolar Transistor

U.S. Patent Nos. 4,969,028; 5,998,833
Inducted in 2016
Born April 28, 1948

B. Jayant Baliga invented the insulated gate bipolar transistor (IGBT), a semiconductor power switch that has reduced gasoline consumption by 10% and improved electrical energy efficiency by more than 40%. A tiny chip that controls energy usage, the IGBT is used in household appliances, cars, solar panels, fluorescent lighting, medical equipment, bullet trains, and more.

Baliga joined General Electric's R&D Center in 1974. He soon proposed and demonstrated a new high voltage transistor that utilized a MOS-gate region to control a bipolar current within a single device for the first time. Today, the device is manufactured worldwide as the IGBT. Since its invention, the IGBT has saved consumers $24 trillion by reducing gasoline consumption by over 1.5 trillion gallons and electricity usage by over 75,000 TWhrs.

Baliga has been granted 120 U.S. patents, many of them commercialized via four successful start-up companies he founded in North Carolina. Among these, the GDMOSFET transistor is being manufactured worldwide for low voltage applications in computers, data-centers, and automotive electronics.

A native of India, Baliga received his undergraduate degree from the Indian Institute of Technology-Madras, and M.S. and Ph.D. degrees from Rensselaer Polytechnic Institute. He is a Distinguished University Professor of Electrical Engineering at North Carolina State University.

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