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Chin. Phys. B, 2017, Vol. 26(1): 017304    DOI: 10.1088/1674-1056/26/1/017304
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev   Next  

Low power fluorine plasma effects on electrical reliability of AlGaN/GaN high electron mobility transistor

Ling Yang(杨凌)1,2, Xiao-Wei Zhou(周小伟)1,2, Xiao-Hua Ma(马晓华)1,2, Ling Lv(吕玲)1,2, Yan-Rong Cao(曹艳荣)4, Jin-Cheng Zhang(张进成)1,3, Yue Hao(郝跃)1,3
1. State Key Discipline Laboratory of Wide Bandgap Semiconductor Technology, Xidian University, Xi'an 710071, China;
2. School of Advanced Materials and Nanotechnology, Xidian University, Xi'an 710071, China;
3. School of Microelectronics, Xidian University, Xi'an 710071, China;
4. School of Mechano-Electronic Engineering, Xidian University, Xi'an 710071, China
Abstract  The new electrical degradation phenomenon of the AlGaN/GaN high electron mobility transistor (HEMT) treated by low power fluorine plasma is discovered. The saturated current, on-resistance, threshold voltage, gate leakage and breakdown voltage show that each experiences a significant change in a short time stress, and then keeps unchangeable. The migration phenomenon of fluorine ions is further validated by the electron redistribution and breakdown voltage enhancement after off-state stress. These results suggest that the low power fluorine implant ion stays in an unstable state. It causes the electrical properties of AlGaN/GaN HEMT to present early degradation. A new migration and degradation mechanism of the low power fluorine implant ion under the off-stress electrical stress is proposed. The low power fluorine ions would drift at the beginning of the off-state stress, and then accumulate between gate and drain nearby the gate side. Due to the strong electronegativity of fluorine, the accumulation of the front fluorine ions would prevent the subsequent fluorine ions from drifting, thereby alleviating further the degradation of AlGaN/GaN HEMT electrical properties.
Keywords:  AlGaN/GaN HEMT      low plasma power      fluorine implant ion      early electrical reliability  
Received:  25 July 2016      Revised:  17 October 2016      Accepted manuscript online: 
PACS:  73.61.Ey (III-V semiconductors)  
  85.30.Tv (Field effect devices)  
  85.30.De (Semiconductor-device characterization, design, and modeling)  
Fund: Projects supported by the Key Program of the National Natural Science Foundation of China (Grant No. 61334002) and the National Natural Science Foundation of China (Grant Nos. 61604114, 61404097, and 61504099).
Corresponding Authors:  Ling Yang     E-mail:  yangling@xidian.edu.cn

Cite this article: 

Ling Yang(杨凌), Xiao-Wei Zhou(周小伟), Xiao-Hua Ma(马晓华), Ling Lv(吕玲), Yan-Rong Cao(曹艳荣), Jin-Cheng Zhang(张进成), Yue Hao(郝跃) Low power fluorine plasma effects on electrical reliability of AlGaN/GaN high electron mobility transistor 2017 Chin. Phys. B 26 017304

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