Novel Guard Ring Structure formed by Self-align Trench Implant in SiC MOSFET

Wei Chen Yu, Chia Long Hong, Chang Ching Tu, Yi Kai Hsiao, Hao Chung Kuo

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

Abstract

SiC is a promising wide bandgap semiconductor for high power applications due to its high breakdown electric field and thermal conductivity. However, the breakdown voltage of SiC MOSFETs needs further improvement, and the guard ring (GR) design is critical for this purpose. This paper proposes a new GR structure for SiC MOSFETs called the self-align trench implant GR, which can improve the breakdown voltage by 10% to 221S.2V while using less chip area compared to the conventional design. Furthermore, this proposed self-align designed processes to combine the trench etch and GR implant not only eliminate the need of another photomask but can be integrated into the planar and trench MOSFET process flow.

Original languageEnglish
Title of host publicationWiPDA Asia 2023 - IEEE Workshop on Wide Bandgap Power Devices and Applications in Asia
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9798350337112
DOIs
StatePublished - 2023
Event2023 IEEE Workshop on Wide Bandgap Power Devices and Applications in Asia, WiPDA Asia 2023 - Hsinchu, Taiwan
Duration: 27 Aug 202329 Aug 2023

Publication series

NameWiPDA Asia 2023 - IEEE Workshop on Wide Bandgap Power Devices and Applications in Asia

Conference

Conference2023 IEEE Workshop on Wide Bandgap Power Devices and Applications in Asia, WiPDA Asia 2023
Country/TerritoryTaiwan
CityHsinchu
Period27/08/2329/08/23

Keywords

  • Guard Ring Implant
  • Power device
  • SiC
  • Silicon Carbide
  • Trench etch

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