A backplane for a display device includes a substrate layer, a first metal layer and a second metal layer. The first metal layer protrudes beyond the substrate layer and includes at least one transverse portion and at least one longitudinal portion extending from the transverse portion. The substrate layer is attached on the transverse portion. The second metal layer is attached on the transverse portion. An edge of the substrate layer and an edge of the second metal layer face the longitudinal portion. The longitudinal portion has a length that is greater than or equal to a thickness of the substrate layer and the second metal layer.