Simulation-based ESD protection performance of modified DDD_NSCR device with counter pocket source structure for high voltage operating I/O application

고전압 동작용 I/O 응용을 위해 Counter Pocket Source 구조를 갖도록 변형된 DDD_NSCR 소자의 ESD 보호성능 시뮬레이션

  • 서용진 (세한대학교 소방행정학과/나노정보소재연구소) ;
  • 양준원 (세한대학교 항공교통물류학과)
  • Received : 2016.11.22
  • Accepted : 2016.12.06
  • Published : 2016.12.31

Abstract

A conventional double diffused drain n-type MOSFET (DDD_NMOS) device shows SCR behaviors with very low snapback holding voltage and latch-up problem during normal operation. However, a modified DDD_NMOS-based silicon controlled rectifier (DDD_NSCR_CPS) device with a counter pocket source (CPS) structure is proven to increase the snapback holding voltage and on-resistance compare to standard DDD_NSCR device, realizing an excellent electrostatic discharge protection performance and the stable latch-up immunity.

종래의 이중 확산된 드레인을 갖는 n형 MOSFET(DDD_NMOS) 소자는 매우 낮은 스냅백 홀딩 전압을 갖는 SCR 특성을 나타내므로 정상적인 동작 동안 래치업 문제를 초래한다. 그러나, 본 연구에서 제안하는 counter pocket source (CPS) 구조를 갖도록 변형된 DDD_NMOS 구조의 SCR 소자는 종래의DDD_NSCR_Std 표준소자에 비해 스냅백 홀딩 전압과 온-저항을 증가시켜 우수한 정전기 보호 성능과 높은 래치업 면역 특성을 얻을 수 있는 것으로 확인되었다.

Keywords

References

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