Second Breakdown of Vertical Power MOSFET's

Chen-Ming Hu, Min Hwa Chi

Research output: Contribution to journalArticlepeer-review

25 Scopus citations


It is shown that a phenomenon of second breakdown similar to that in bipolar transistors can occur in vertical power MOSFET's. A model for the phenomenon of second breakdown involving the avalanche multiplication of the channel current, the parasitic bipolar transistor, and base resistance is proposed. After presenting the theory, this model is compared with experiments on four-terminal V-groove test devices in which the substrate can be accessed independently. Good agreement is achieved between calculated and measured boundaries of the safe operating area. The model should be applicable to DMOS devices as well.

Original languageEnglish
Pages (from-to)1287-1293
Number of pages7
JournalIEEE Transactions on Electron Devices
Issue number8
StatePublished - 1 Jan 1982


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