Manufacturing method of substrate for oled

The OLED substrate manufacturing method are disclosed. OLED substrate manufacturing method according to an embodiment of the present invention comprises the steps of forming a plurality of nano structures are spaced apart at a predetermined interval so that the part exposed to the surface of the substrate using the (Chemical Bath Deposition) CBD method to one or both sides of the substrate .; And by etching the exposed portions of the substrate it includes a step of forming a concave-convex structure on the surface of the substrate.