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多晶硅薄膜的表面处理工艺

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

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【作者】 曾祥斌Johnny K O Sin徐重阳饶瑞

【Author】 ZENG Xiang-Bin, Johnny K O Sin, XU Zhong-Yang, RAO Rui ( Department of Electronic Science and Technology Huazhong University of Science and Technology, Wuhan 430074, Chian; Department of Electrical and Electronic Engineering, The Hong Kong University of

【机构】 华中科技大学电子科学与技术系!武汉 430074香港科技大学电气与电子工程系

【摘要】 采用NH3和N2O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NH3和N2O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.

【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-St thin film in the channel region are the major causes.

【关键词】 NH3N2O表面钝化p-Si TFT
【Key words】 NH3N2Osurface passivationpoly-Si TFT
【基金】 与香港科技大学电气与电子工程系合作项目
  • 【文献出处】 无机材料学报 ,Journal of Inorganic Materials , 编辑部邮箱 ,2001年04期
  • 【分类号】TN304.055
  • 【被引频次】9
  • 【下载频次】272
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