A flexible display and method of manufacturing the same are disclosed. In one aspect, the method includes forming a metal peroxide layer over a supporting substrate, forming a metal layer over the metal peroxide layer and forming a flexible substrate over the metal layer. The method also includes forming a display layer over the flexible substrate, irradiating the supporting substrate with laser light in a direction from the supporting substrate to the flexible substrate so as to form a metal oxide layer and separating the supporting substrate from the flexible substrate with the metal oxide layer as a boundary between the supporting substrate and the flexible substrate.