High-Voltage Silicon Carbide Thyristors on N-Doped Epi for Pulsed Power

Heather O'Brien, Aderinto Ogunniyi, Sei Hyung Ryu, Tsz Tsoi, Stephen B. Bayne

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The Army Research Laboratory (ARL) has funded the development of high-voltage silicon carbide (SiC) thyristors and diodes for pulsed power switching, culminating in the novel 1.0 cm2, 15-kV SiC thyristor with n-type doping in the drift layer. N-type thyristors have been predicted to achieve faster switching speeds and lower switching losses, but were only recently realized following the development of novel fabrication techniques. These devices are targeted to reduce volume and increase reliability of pulsed switches in high-energy systems. ARL and Texas Tech University characterized the first fabrication lot of these devices for high-voltage DC-blocking capability (<1 μA leakage at 15 kV), optimal turn-on controls (4 A gate pulse), and on-state resistance at high current densities (up to 3 kA/cm2). This paper presents recent analysis of the turn-on speed and dI/dt capability for low-kHz pulse repetition of the n-type SiC thyristors as compared to previously reported 15-kV p-doped SiC thyristors. The current through the n-thyristor peaks 50 ns earlier, reaches 10% higher amplitude, and has significantly faster dI/dt as compared to the similarly designed p-thyristor.

Original languageEnglish
Title of host publication2021 IEEE Pulsed Power Conference, PPC 2021
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781665433471
DOIs
StatePublished - 2021
Event2021 IEEE Pulsed Power Conference, PPC 2021 - Denver, United States
Duration: Dec 12 2021Dec 16 2021

Publication series

NameIEEE International Pulsed Power Conference
Volume2021-December
ISSN (Print)2158-4915
ISSN (Electronic)2158-4923

Conference

Conference2021 IEEE Pulsed Power Conference, PPC 2021
Country/TerritoryUnited States
CityDenver
Period12/12/2112/16/21

Keywords

  • gate turn-off thyristor
  • pulse-forming network
  • pulsed power
  • safe operating area
  • silicon carbide

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