TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The catalyst metal comprises at least one selected from nickel (Ni) and copper (Cu). The catalyst metal is removed by wet etching. The dopant vapor is composed of a volatile doping solution that is vaporized, where the doping solution comprises at least one selected from gold(III) chloride (AuCl3), nitric acid (HNO3), and hydrochloric acid (HCl).    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Method: In manufacturing graphene, preparing of the carrier member in which the graphene is formed on one surface involves: forming the graphene on two surfaces of a catalyst metal; forming the carrier member on the graphene that is formed on one surface of the catalyst metal; and removing the catalyst metal. The method further involves removing the graphene formed on the other surface of the catalyst metal before the removing of the catalyst metal; and forming a protection member on the exposed graphene after the removing of the carrier member. The carrier member is a heat-releasable film. The doping of the graphene is performed in a sealed space.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The target member is formed of a material that is formed according to a roll-to-roll method, and the target member comprises at least one selected from polyethylene terephthalate (PET), polyimide (PI), polycarbonate, and polymethyl methacrylate (PMMA). In manufacturing the graphene film, preparing of the heat-releasable film in which the graphene film is formed on one surface comprises: forming the graphene film on two surfaces of a roll-type catalyst metal film; forming the heat-releasable film on the graphene film that is formed on one surface of the catalyst metal film; removing the graphene film formed on the other surface of the catalyst metal film; and removing the catalyst metal film, where the operations are performed in one direction according to a roll-to-roll method. The method further involves forming a roll-type protection film on the exposed graphene film after the removing of the heat-releasable film, where the forming of the roll-type protection film is performed in one direction according to a roll-to-roll method. In the dopant vapor, some dopant vapor that is not doped on the graphene film is liquefied by using a cooler to thus become the doping solution. Doping of the graphene film is performed in a sealed space. EXAMPLE - No suitable example given.