Display device and method of manufacturing the same

A method of manufacturing an electronic device, the method comprising steps of:

• providing a display device configured to display an image based on an input image data and a control signal;
• and
• providing a host processor configured to provide the input image data and the control signal to the display device,
• wherein the providing the display device includes:
• providing a power line in a display area on a substrate including a display area and a contact area located in the display area to overlap the contact area;
• providing a passivation layer including a contact hole exposing at least a porting of an upper surface of the power line in the contact area on the substrate and the power line;
• providing a preliminary via insulation layer on the power line and the passivation layer to cover the power line and the passivation layer;
• providing a via insulation layer including a via contact hole connected to the contact hole in the contact area by patterning the preliminary via insulation layer;
• removing a portion of the passivation layer overlapping the via insulation layer and the power line in the contact area so that the via insulation layer has a protrusion protruding toward a center of the via contact hole;
• and
• providing a common electrode electrically connected to the power line in the contact area on the power line and the via insulation layer.