A thin film transistor array substrate and the manufacturing method thereof are disclosed herein. A first patterned metal layer, an insulating layer, a patterned layer, and a second patterned metal layer are sequentially formed on a substrate. Then, a number of scan lines and a number of source lines are disposed on the substrate and define a number of pixel regions. A number of the storage capacitance lines are disposed on the substrate in a direction extending along the scan lines and across the pixel regions, wherein each of the storage capacitance lines is essentially perpendicular to each of the source lines and to form a cross portion. A number of patterned thin films are disposed on the storage capacitance lines and above the cross portion.