Backside layout design of Snapback-free RCIGBT with multiple-cell

Zhongke Chang, Xiaofei Zhu, Masahide Inuishi

Research output: Contribution to journalConference articlepeer-review


—A backside layout design for multiple cell RCIGBT is proposed to suppress the snapback effect which happens in the turn-on process of RCIGBT in this paper. The internal operation mechanism of RCIGBT has been analyzed by device simulation, proving that our backside layout design works well. Reduction in the ratio of backside N+/P+ area as well as the N buffer doping density and increase in the number of cells in chip are all proved as useful methods in reducing snapback voltage. Although some novel RCIGBT structures have been proposed to eliminate the snapback effect, most of them have been based on a single cell structure, which is not sufficient for the analysis of RCIGBT. It’s more practical and feasible in production to simply optimize the backside layout design of N+, P+ short area with the multiple cell RCIGBT structure. Here we will report on the analysis of the snapback effect and the backside optimum layout design for the multiple cell RCIGBT.

Original languageEnglish
Pages (from-to)299-303
Number of pages5
JournalLecture Notes in Engineering and Computer Science
Publication statusPublished - 2019
Event2019 International MultiConference of Engineers and Computer Scientists, IMECS 2019 - Kowloon, Hong Kong
Duration: 2019 Mar 132019 Mar 15


  • Backside layout
  • Multiple cell
  • Snapback

ASJC Scopus subject areas

  • Computer Science (miscellaneous)


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