Patent ID: 7642554

Claim:
An array substrate for a liquid crystal display device, comprising: a substrate defining a display area and a non-display area; an n-type driving TFT and a p-type driving TFT in the non-display area; a switching TFT in the display region; a storage capacitor in the display region, the storage capacitor including first to third storage layers sequentially layered with intervening insulating layers, wherein the first storage layer contacts a fourth semiconductor layer under the first storage layer; and a pixel electrode in the display region, the pixel electrode connected to the switching TFT; Wherein, the p-type driving TFT includes a second semiconductor layer including an active region and an ohmic contact region in a periphery of the active region, a first gate electrode, and first source and first drain electrodes, and wherein the ohmic contact region of the p-type driving TFT is doped with high concentration p-type (p+) impurities.