A flat panel display includes: a substrate that includes a display region and a non-display region at a periphery of the display region; a pixel array disposed on the substrate of the display region; an input pad part disposed on the substrate of the non-display region; a bonding pad part disposed on the substrate of the non-display region, the bonding pad part including a plurality of output pads connected to the pixel array and a plurality of input pads connected to the input pad part; and a protective layer disposed on the substrate of the non-display region, the protective layer having openings formed therein that expose portions of the bonding pad part and the input pad part, wherein the opening of the protective layer is smaller than the bonding pad part, wherein the protective layer is thinner at a portion that overlaps the bonding pad part than at other portions.