Vacuum channel transistors for harsh environment electronics

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Join us at 10:30 a.m. in MEC 114 for a presentation by Ranajoy Bhattacharya, a research scientist in Boise State University’s Department of Electrical and Computer Engineering.


Vacuum electronic devices were once powerful amplifiers, but were replaced by solid-state devices such as transistors in the mid-’60s due to ease of manufacture, lower cost, and better integration into circuits. However, vacuum tubes still boast advantages in harsh environments and high power. These advantages make it possible to miniaturize vacuum tubes down to the micro- and nanoscale using modern semiconductor manufacturing techniques.

This approach offers the best of both worlds: high power/frequency, low cost, and compatibility with harsh environments. In addition, micro- and nanoscale vacuum tubes, with their low-temperature field emitter cathodes (no heating required) and lower operating voltages, have the potential to rival modern transistors in performance, making them competitive with modern transistors in harsh environment electronics. You will be able to do it. This presentation explores some of the advances in nanoscale field emitter-based harsh environment electronics research currently underway at Boise State University.


Speaker biography

Dr. Bhattacharyya received his Ph.D. degree from the Department of Electrical and Computer Engineering at Seoul National University in Seoul, South Korea in 2018. During her PhD, she developed and experimentally tested a new high current density tungsten-doped graphene-based sheet beam field emitter. A compact HE cathode and electron gun for application in vacuum electronic devices in the THz range. He currently works as a research associate at Boise State University, working on developing electronics for harsh environments using micro- and millimeter-scale field emitters. His main research interests are high-power, high-frequency vacuum electronic devices in food processing facilities, field emitter devices for harsh environment electronics, cold atmospheric pressure plasma-based pathogen removal systems, and high-frequency-based biofilm detection systems.

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