| 摘要 |
An array substrate for a flat panel display device includes a thin film transistor Tr with an oxide semiconductor layer 110. To protect the oxide semiconductor layer from incident light a light-shielding pattern 103 is arranged on the array substrate 101; an auxiliary line AL is connected to the light-shielding pattern 103 and supplies a constant voltage to the light-shielding pattern103 to maintain a constant electric potential across the shield layer; a buffer layer 105 of an inorganic material is located on the light-shielding pattern and a surface of the array substrate; the oxide semiconductor layer 110 is located on the buffer layer 105 and the light-shielding pattern; an inter-insulating layer 125 is formed on the buffer layer, wherein the oxide semiconductor layer 110 includes an active portion 110a located entirely on the light-blocking pattern and having a channel formed thereon, and conductive portions 110b located on sides of the active portion. This arrangement improves the quality of the display and prevents afterimages. |
