▎ 摘　　要

NOVELTY - A copper-based thin metal film to be used for a catalytic metal for synthesizing graphene, comprises 0.001-0.05 wt.% silver. USE - The copper-based thin metal film is useful for a catalytic metal for synthesizing graphene (claimed). ADVANTAGE - The copper-based thin metal film can be efficiently used for synthesizing graphene of high quality, which is uniform and of which a surface resistive characteristic is improved. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is a method of manufacturing graphene, comprising: preparing a copper-based thin metal film which includes silver of 0.001-0.05 wt.% and of which an average size of each of copper grains is at least 20 mu m; and growing graphene on the copper-based thin metal film by providing heat and reacting a reaction gas including carbon to the copper-based thin metal film.