| abstract |
The present invention provides a thin-film transistor (TFT) substrate, which can be fabricated simply and at reduced cost, and a method of fabricating the TFT substrate. The TFT substrate includes: an insulating substrate; gate wiring that extends on the insulating substrate in a first direction; data wiring that extends on the gate wiring in a second direction, and includes a lower layer and an upper layer; and a semiconductor pattern that is disposed under the data wiring and has substantially the same shape as the data wiring except for a channel region, wherein root-mean-square roughness of a top surface of the data wiring is 3 nm or less. |