Theory of Superjunction With NFD and FD Modes Based on Normalized Breakdown Voltage

Abstract
A new relationship between the specific ON-resistance R ON and breakdown voltage V B for the balanced symmetric superjunction (SJ) device is presented to produce the lowest R ON for a given V B . The design formulas, including the doping density NW and the drift length L d , are given for both the nonfull depletion (NFD) and the full depletion SJ devices with an introduction of the normalized V B factor η. For the NFD SJ MOSFET, an R ON ∝ V1.03 B relationship is obtained. The analytical results show good agreement with the numerical results.
Funding Information
  • Natural Science Foundation of Guangdong Province (2014A030313736)
  • Fundamental Research Funds for the Central Universities (ZYGX2013J030)
  • National Natural Science Foundation of China (61376080, 61474017)