Graphene structure and method of manufacturing the graphene structure, and graphene device and method of manufacturing the graphene device

A graphene structure and a method of manufacturing the graphene structure, and a graphene device and a method of manufacturing the graphene device. The graphene structure includes a substrate; a growth layer disposed on the substrate and having exposed side surfaces; and a graphene layer disposed on the side surfaces of the growth layer. A growth layer 120 and a protective layer 130 are sequentially formed on a substrate 110. The growth layer 120 is a layer from which a graphene layer 140 grows, and may be formed of for example, metal or germanium (Ge). The growth layer 120 may have a thickness of, for example, about several nanometers. As will be described later, the thickness of the growth layer 120 determines a width W of the graphene layer 140. Then, the protective layer 130 is formed on an upper surface of the growth layer 120. A groove 150 is formed in the protective layer 130 and the growth layer 120. The groove 150 is formed in a predetermined shape by sequentially etching the protective layer 130 and the growth layer 120. The groove 150 exposes side surfaces of the protective layer 130 and the growth layer 120 and an upper surface of the substrate 110. The groove 150 may be formed by etching the protective layer 130 and the growth layer 120 by using an etching mask until the upper surface of the substrate 110 is exposed. FIG. 3A is a perspective view showing that the graphene layer 140 is grown from the side surfaces of the growth layer 120.