Pixel array and manufacturing method thereof

A manufacturing method of a pixel array, the manufacturing method comprising:

• providing a substrate having a display area and a non-display area;
• forming a plurality of scan lines, a plurality of data lines and a plurality of active devices electrically connected to the scan lines and the data lines in the display area;
• forming a plurality of first wires and a plurality of first pads electrically connected to the first wires in the non-display area at the same time;
• forming a plurality of second wires and a plurality of second pads electrically connected to the second wires in the non-display area at the same time, wherein the first pads and the second pads are disposed in different layers and arranged alternately;
• forming an insulating layer on the substrate for covering the data lines, the scan lines, the active devices, the first pads, the second pads, the first wires and the second wires;
• forming an organic planarization layer on the insulating layer, wherein the organic planarization layer has a plurality of first openings, a plurality of second openings and a plurality of third openings;
• etching the insulating layer by using the organic planarization layer as an etching mask to form a plurality of first contact vias, a plurality of second contact vias and a plurality of third contact vias, wherein each of the first contact vias expose the corresponding first pad, each of the second contact vias expose the corresponding second pad, and each of the third contact vias expose a portion of the corresponding active device;
• and
• forming a plurality of first pad electrodes and a plurality of second pad electrodes on the organic planarization layer in the non-display area, and forming a plurality of pixel electrodes on the organic planarization layer in the display area, wherein the first pad electrodes are electrically connected to the first pads through the first contact vias, the second pad electrodes are electrically connected to the second pads through the second contact vias, and the pixel electrodes are electrically connected to the active devices through the third contact vias.