Display device and method for manufacturing display device

A method for manufacturing a display device, the method comprising:

• preparing a mother substrate including a first surface, a second surface opposite to the first surface, and a plurality of display device areas on the first surface;
• forming a plurality of pixel areas on each of the plurality of display device areas;
• forming a first connection pad on a portion adjacent to an edge on each of the plurality of display device areas;
• forming a second connection pad on a portion adjacent to the edge on the second surface, the second connection pad being larger than the first connection pad and including an extension extending in a direction along the edge;
• cutting the mother substrate along the edge of each of the plurality of display device areas to form display device substrates;
• and
• forming, on each of the display device substrates, a side wire extending from the first surface through a cut surface being a side surface of each of the display substrates to the second surface to connect the first connection pad and the second connection pad.