a method for fabricating a soft mold is disclosed , in which process matching is high regardless of a size of a master mold for forming the soft mold . the method for fabricating a soft mold includes arranging a master mold on a jig , forming a pre - polymer layer in the jig , attaching a back - plane substrate onto the pre - polymer layer , selectively curing the pre - polymer layer to selectively form a polymer layer , stripping the polymer layer and the pre - polymer layer from the jig and the master mold , and removing the pre - polymer layer that is not cured .