| 摘要 |
A system for displaying images comprises a thin film transistor (TFT) device comprising first and second active layers disposed on a substrate in the driving circuit region and in the pixel region, respectively. Each active layer comprises a channel region, a source/drain region and a lightly doped region formed therebetween. Two gate structures are disposed on the first and second active layers, respectively. Each gate structure comprises a stacked first and second gate dielectric layers and a gate layer, and the second gate dielectric layer has a length shorter than that of the first gate dielectric layer but longer than the gate length of the gate layer. The lightly doped region of the first active layer has a length different from that of the second active layer.
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