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合肥鑫晟光电科技有限公司,安徽 合肥,230012
[ "林致远(1978-),男,中国台湾人,博士,研究员,主要从事LCD Array工艺开发以及TFT特性解析。E-mail:linzhiyuan@boe.com.cn" ]
[ "杨成绍(1984-),男,中国安徽人,硕士,研究员,主要从事LCD Array工艺开发以及TFT特性解析。E-mail:yangchengshao@boe.com.cn" ]
[ "邹志翔(1986-),男,中国湖北人,硕士,研究员,主要从事LCD Array工艺开发以及TFT特性解析。E-mail:zouzhixiang@boe.com.cn" ]
[ "操彬彬(1987-),男,中国安徽人,硕士,研究员,主要从事LCDArray工艺开发以及TFT特性解析。E-mail:caobinbin@boe.com.cn" ]
[ "黄寅虎(1986-),男,中国湖北人,硕士,部长,主要从事LCD Array工艺开发以及TFT特性解析。E-mail:huangyinhu@boe.com.cn" ]
[ "文锺源(1971-),男,韩国人,硕士,部长,主要从事LCD Array工艺开发以及TFT特性解析。E-mail:jwmoon@boe.com.cn" ]
[ "王章涛(1977-),男,中国安徽人,博士,总监,主要从事LCD Array工艺开发以及TFT特性解析。E-mail:wangzhangtao@boe.com.cn" ]
收稿日期:2016-01-11,
修回日期:2016-01-17,
纸质出版日期:2016-04-05
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林致远, 杨成绍, 邹志翔等. ITO像素电极工序对于HADS产品TFT特性的影响[J]. 液晶与显示, 2016,31(4): 370-374
LIN Zhi-yuan, YANG Cheng-shao, ZOU Zhi-xiang etc. Effects of pixel ITO process on TFT characteristics of HADS product[J]. , 2016,31(4): 370-374
林致远, 杨成绍, 邹志翔等. ITO像素电极工序对于HADS产品TFT特性的影响[J]. 液晶与显示, 2016,31(4): 370-374 DOI: 10.3788/YJYXS20163104.0370.
LIN Zhi-yuan, YANG Cheng-shao, ZOU Zhi-xiang etc. Effects of pixel ITO process on TFT characteristics of HADS product[J]. , 2016,31(4): 370-374 DOI: 10.3788/YJYXS20163104.0370.
通过不同TFT几何结构验证ITO像素电极工序对于HADS产品TFT特性的影响。实验结果显示TN5mask与倒反HADS结构(源漏极ITO像素电极)二者有比现行HADS结构(ITO像素电极源漏极)更高的I
on
提升比率达到40%。推测主要原因为现行HADS结构(ITO像素电极源漏极)在Si岛完成后进行ITO像素电极工序增加了N
+
与源漏极之间接触阻抗导致I
on
降低。对于HADS产品
倒反HADS结构(源漏极ITO像素电极)可以具有更好的TFT特性表现。对现行HADS结构
在沟道形成工序前的N
+
表面ITO残沙程度越少则I
off
越低;对于倒反HADS结构
沟道形成之后沟道表面ITO残沙程度对则对TFT特性没有明显影响。对于Poole-Frenkel区域
现行HADS结构(ITO像素电极源漏极)比TN5mask与倒反HADS结构(源漏极ITO像素电极)二者较低I
off
[
V
g
=-20 V]
下降达50%
主要为N
+
与源漏极之间接触阻抗增加的影响。
Effects of TFT structure on HADS product TFT properties was investigated. TN 5 mask and reversed HADS structure (SD pixel ITO) shows higher I
on
about 40% than current HADS structure (pixel ITO SD). The lower I
on
of current HADS structure (pixel ITO SD) may result from higher N+/SD contact resistance due to damaged N
+
surface result from pixel ITO process on N
+
surface. For current HADS structure
less ITO remain before channel formation leads to a lower I
off
while it shows no effect on TFT characteristic as ITO remain stays on formed channel for reversed HADS structure (SD pixel ITO). The current HADS structure shows a 50% lower Poole-Frenkel leakage current and lower Poole-Frenkel I-
V
slope than TN 5mask and reversed HADS structure (SD pixel ITO) also due to a higher N+/SD contact resistance.
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SERVATI P, NATHAN A. Modeling of the reverse characteristics of a-Si:H TFTs[J]. IEEE Transactions on Electron Devices, 2002, 49(5):812-819.
王守坤, 袁剑峰, 郭会斌, 等. TFT栅极绝缘层和非晶硅膜层的ITO污染对电学特性影响的研究[J]. 液晶与显示, 2015, 30(6):930-936. WANG S K, YUAN J F, GUO H B, et al. Influence of ITO contamination of TFT gate insulation & a-Si layers on electrical characteristics[J]. Chinese Journal of Liquid Crystals and Displays, 2015, 30(6):930-936. (in Chinese)
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