无机材料学报

• 研究论文 • 上一篇    下一篇

多晶硅薄膜的表面处理工艺

曾祥斌1; Johnny K O Sin2; 徐重阳1; 饶瑞1   

  1. 1. 华中科技大学电子科学与技术系, 武汉 430074; 2. 香港科技大学电气与电子工程系
  • 收稿日期:2000-08-07 修回日期:2000-09-25 出版日期:2001-07-20 网络出版日期:2001-07-20

Surface Plasma Passivation of the Polycrystalline Silicon Thin Films by Using NH3 or N2O Gas

ZENG Xiang-Bin1; Johnny K O Sin2; XU Zhong-Yang1; RAO Rui 1   

  1. 1.Department of Electronic Science and Technology Huazhong University of Science and Technology; Wuhan 430074; Chian; 2. Department of Electrical and Electronic Engineering; The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, China
  • Received:2000-08-07 Revised:2000-09-25 Published:2001-07-20 Online:2001-07-20

摘要: 采用NH和NO的等离子体分别对p-Si(多晶硅)薄膜表面进行了钝化处理,处理后的 p-Si TFT(薄膜晶体管)具有比未处理 TFT更优越的性能,通电试验与热应力试验后,处理后的器件呈现出更好的承受电负荷和热应力能力,钝化的微观机理是NH和NO等离子体中和了p-Si薄膜的悬挂键,形成牢固的Si-N键,减少了表面态密度.

关键词: NH3, N2O, 表面钝化, p-Si TFT

Abstract: The poly-Si thin film was passivated by using NH3 or N2O plasma before deposition of gate diode. The poly-Si TFTs fabricated with this process have better electrical characteristics than those of conventional poly-Si TFT without NH3 or N2O plasma passivation. These devices also have better hot-carrier endurance and thermal stability. Both the nitrogen pile-up at the SiO2/poly-Si interface and the strong Si-N bond formation to terminate the dangling bonds at the grand boundaries of the poly-Si thin film in the channel region are the major causes.

Key words: NH3, N2O, surface passivation, poly-Si TFT

中图分类号: