Excimer laser annealed poly-Si thin film transistor with self-aligned lightly doped drain structure

被引:12
|
作者
Kim, YH [1 ]
Hwang, CS [1 ]
Song, YH [1 ]
Chung, CH [1 ]
Ko, YW [1 ]
Sohn, CY [1 ]
Kim, BC [1 ]
Lee, JH [1 ]
机构
[1] Elect & Telecommun Res Inst, Basic Res Lab, Yuseong Gu, Taejon 305350, South Korea
关键词
poly-Si; excimer laser; grain; trap; dispersion;
D O I
10.1016/S0040-6090(03)00853-8
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We have made an excimer laser annealed poly-Si thin film transistor (TFT). The stress of the poly-Si films crystallized by excimer laser annealing is studied by Raman spectroscopy. The transverse-optic phonon frequency is independent of the excimer laser energy, but dependant on the precursor a-Si film thickness. The nMOS TFT with a self-aligned lightly doped drain (LDD) structure shows low leakage current. The large leakage current of the pMOS TFT with non-LDD structure is reduced by the off-state stress. The gate to channel capacitance as a function of gate voltage for nMOS TFT shows the characteristic parallel shift of the capacitance-voltage curves with frequency variation. (C) 2003 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:169 / 173
页数:5
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