Mechanism and a reduction technique for large reverse leakage current in p-n junctions

Kiyonori Ohyu*, Makoto Ohkura, Atsushi Hiraiwa, Kozo Watanabe


研究成果: Article査読

29 被引用数 (Scopus)


The origin of anomalously large p-n junction leakage current in Si is investigated. The leakage has strong electric field dependence and weak temperature dependence, and therefore cannot be explained by either generation-recombination current or diffusion current. It may be explained by the local Zener effect at local enhancement of the electric field around small precipitates in the depletion layer. Supposing a spherical precipitate, the electric field will be enhanced as much as 1.3 times for a SiO2 precipitate and 3 times for a metal precipitate. The leakage features are explained by the electric field dependence and the temperature dependence of the local Zener probability. A new approach to reduce the local Zener probability by controlling the profile of the electric field is proposed, and the validity of the approach is confirmed by direct experiment and by improvement in the refresh operation of DRAM cells.

ジャーナルIEEE Transactions on Electron Devices
出版ステータスPublished - 1995 8月

ASJC Scopus subject areas

  • 電子工学および電気工学
  • 物理学および天文学(その他)


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