中国物理B ›› 2015, Vol. 24 ›› Issue (10): 107303-107303.doi: 10.1088/1674-1056/24/10/107303

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Effect of the annealing temperature on the long-term thermal stability of Pt/Si/Ta/Ti/4H-SiC contacts

程越, 赵高杰, 刘益宏, 孙玉俊, 王涛, 陈之战   

  1. Department of Physics, Shanghai Normal University, Shanghai 200234, China
  • 收稿日期:2015-03-07 修回日期:2015-04-24 出版日期:2015-10-05 发布日期:2015-10-05
  • 基金资助:
    Project supported by the Special Prophase Project on the National Basic Research Program of China (Grant No. 2012CB326402), the National Natural Science Found of China (Grant No. 61404085), the Innovation Program of Shanghai Municipal Education Commission, China (Grant No. 13ZZ108), and the Shanghai Science and Technology Commission, China (Grant No. 13520502700).

Effect of the annealing temperature on the long-term thermal stability of Pt/Si/Ta/Ti/4H-SiC contacts

Cheng Yue (程越), Zhao Gao-Jie (赵高杰), Liu Yi-Hong (刘益宏), Sun Yu-Jun (孙玉俊), Wang Tao (王涛), Chen Zhi-Zhan (陈之战)   

  1. Department of Physics, Shanghai Normal University, Shanghai 200234, China
  • Received:2015-03-07 Revised:2015-04-24 Online:2015-10-05 Published:2015-10-05
  • Contact: Chen Zhi-Zhan E-mail:chenwbgs@126.com
  • Supported by:
    Project supported by the Special Prophase Project on the National Basic Research Program of China (Grant No. 2012CB326402), the National Natural Science Found of China (Grant No. 61404085), the Innovation Program of Shanghai Municipal Education Commission, China (Grant No. 13ZZ108), and the Shanghai Science and Technology Commission, China (Grant No. 13520502700).

摘要: The Pt/Si/Ta/Ti multilayer metal contacts on 4H-SiC are annealed in Ar atmosphere at 600 ℃-1100 ℃ by a rapid thermal processor (RTP). The long-term thermal stability is evaluated by aging the annealed contact at 600 ℃ in air. The contact's properties are determined by current-voltage measurement, and the specific contact resistance is calculated based on the transmission line model (TLM). Transmission electron microscope (TEM) and energy-dispersive x-ray spectrometry (EDX) are used to characterize the interface morphology, thickness, and composition. The results reveal that a higher annealing temperature is favorable for the formation of an Ohmic contact with a lower specific contact resistance, and causes the rapid degradation of the Ohmic contact in the aging process.

关键词: Ohmic contact, annealing temperature, thermal stability, interface morphology

Abstract: The Pt/Si/Ta/Ti multilayer metal contacts on 4H-SiC are annealed in Ar atmosphere at 600 ℃-1100 ℃ by a rapid thermal processor (RTP). The long-term thermal stability is evaluated by aging the annealed contact at 600 ℃ in air. The contact's properties are determined by current-voltage measurement, and the specific contact resistance is calculated based on the transmission line model (TLM). Transmission electron microscope (TEM) and energy-dispersive x-ray spectrometry (EDX) are used to characterize the interface morphology, thickness, and composition. The results reveal that a higher annealing temperature is favorable for the formation of an Ohmic contact with a lower specific contact resistance, and causes the rapid degradation of the Ohmic contact in the aging process.

Key words: Ohmic contact, annealing temperature, thermal stability, interface morphology

中图分类号:  (Contact resistance, contact potential)

  • 73.40.Cg
68.55.-a (Thin film structure and morphology)