J4 ›› 2014, Vol. 41 ›› Issue (4): 26-30.doi: 10.3969/j.issn.1001-2400.2014.04.005

• Original Articles • Previous Articles     Next Articles

Influence of drain contact to gate space on the characteristic of the GGNMOS protection device

WU Xiaopeng;YANG Yintang;DONG Gang;GAO Haixia   

  1. (Ministry of Education Key Lab. of Wide Band-Gap Semiconductor Materials and Devices, Xidian Univ., Xi'an  710071, China)
  • Received:2013-03-26 Online:2014-08-20 Published:2014-09-25
  • Contact: WU Xiaopeng E-mail:xpwu@mail.xidian.edu.cn

Abstract:

Based on the test data, the influence of DCGS on the single finger GGNMOS ESD protection device is investigated. The changing tendency of the failure current level is given by the TLP test under various layout parameter conditions realized in the SMIC 018μm CMOS process. Electrical and thermal distribution is detailed based on the device simulation. The results show that the peak value of the current density is moved in the opposite direction to the channel, which lowers the risk of LDD discharge. Meanwhile, the failure current level shows the saturation tendency because of the heat balance of the drain and substrate region which appears when the DCGS is raised to the threshold value.

Key words: drain contact to gate space (DCGS), electrostatic discharge (ESD), gate grounded NMOS (GGNMOS)

CLC Number: 

  • TN406