Thin film transistor array substrate and repair method

A thin film transistor (TFT) array substrate, comprising:

• a substrate, having a pixel region and a peripheral circuit region surrounding the pixel region, the peripheral circuit region having an outer area and an inner area, and the inner area being disposed between the pixel region and the outer area;
• a TFT array, disposed in the pixel region, the TFT array including a first conducting layer and a second conducting layer;
• a plurality of first lead lines, disposed in the peripheral circuit region, the first lead lines being on the same layer of the first conducting layer;
• a plurality of second lead lines, disposed in the peripheral circuit region, the second lead lines being on the same layer of the second conducting layer;
• and
• a plurality of first repair patterns, disposed in the inner area, wherein the first repair patterns are sandwiched between the second lead lines and the substrate, and at least a first pre-repair area is at a region where the second lead lines and the first repair patterns are overlapped.